Herbicidal agents

ABSTRACT

3-[HYDROGEN-, (UNSUBSTITUTED AND HALO, AMINO, ALKYLAMINO, NITRO, ALKYL, ALKOXY, ALKYLMERCAPTO, ARYLOXY AND/OR HALOARYLMERCAPTO, -SUBSTITUTED) ALIPHATIC-, CYCLOALIPHATIC-, ARALIPHATIC-, ARYL-, OR N-heterocyclic- or 0-alkanoyl-, -substituted oxy, mercapto or amino]- 4-[amino; mono and di (unsubstituted and cyano, hydroxy and/or halo, -substituted) alkyl- and/or alkanoyl-, -amino; N- (unsubstituted and cyclo-alkyl, aryl, haloaryl, alkaryl, alkoxy aryl, nitroaryl, halo-nitro-aryl, aryl-alkenyl, heterocyclic and/or nitro-heterocyclic- -substituted) alkylidene-amino or cycloalkylidene-amino; or N-heterocyclic]-6-[(unsubstituted and halo, nitro, carbo lower alkoxy, alkyl, alkoxy, aryloxy, alkylmercapto, arylmercapto and/or aralkylmercapto, -substituted) aliphatic, cycloaliphatic, araliphatic, aryl, heterocyclic or hetero-cyclicalkyl]-1,2,4-triazine-5-ones, which possess herbicidal properties, and which may be produced by conventional methods; herbicidal compositions containing such compounds; and methods of using such compounds as herbicides.

This is a continuation of application Ser. No. 120,713, filed Mar. 3, 1971, now abandoned, which was a continuation-in-part of Ser. No. 6,647 filed Jan. 28, 1970, now U.S. Pat. No. 3,671,523, which is a continuation-in-part of Ser. No. 630,225, filed Apr. 12, 1967, now pending.

The present invention relates to and has for its objects the provision for particular substituted 4-amino-1,2,4-triazine-5-ones, some of which are known, which possess valuable, especially selective, herbicidal properties, active compositions in the form of mixtures thereof with solid and liquid dispersible carrier vehicles, and methods for their preparation and use, especially for combatting weeds, undesired plants, and the like; with other and further objects of this invention becoming apparent from a study of the within specification and accompanying examples.

It is known that 1,3,5-triazines can be used for the control of weeds (see Belgian Pat. No. 540,590). In this group of active compounds, 2,6-di-(ethylamino)-4-chloro-1,3,5-triazine (A) has attained a considerable practical significance.

It has now been found, in accordance with the present invention, that the particular 4-amino-1,2,3-triazine-5-ones having the formula ##EQU1## in which

R is selected from the group consisting of alipphatic having 1-18 carbon atoms, cycloaliphatic having 5-10 ring carbon atoms, araliphatic having 6-10 ring carbon atoms in the corresponding aryl moiety and 1-4 carbon atoms in the aliphatic moiety, aryl having 6-10 ring carbon atoms, heterocyclic having 5-6 ring members with at least one hetero linking atom selected from the group consisting of O, N, S and mixtures of such hetero atoms, heterocyclic-lower alkyl in which the heterocyclic moiety has 5-6 ring members with at least one hetero linking atom selected from the group consisting of O, N, S and mixtures of such hetero atoms, and such aliphatic, cycloaliphatic, araliphatic, aryl, heterocyclic and heterocyclic-lower alkyl, respectively, which is substituted with at least one substituent selected from the group consisting of halo, nitro, carbo lower alkoxy, lower alkyl, lower alkoxy, aryloxy having 6-10 ring carbon atoms, lower alkylmercapto, arylmercapto having 6-10 ring carbon atoms in the aryl moiety, and mixtures of such substituents;

R₁ and R₂ each respectively is selected from the group consisting of hydrogen, alkyl having 1-12 carbon atoms, alkanoyl having 1-6 carbon atoms, and such alkyl and alkanoyl, respectively, which is substituted with at least one substituent selected from the group consisting of cyano, hydroxy, halo, and mixtures of such substituents,

with the proviso that R₁ and R₂ when taken together represent alkylidene having 1-12 carbon atoms, cycloalkylidene having 5-8 ring carbon atoms, and such alkylidene and cycloalkylidene, respectively, which is substituted with at least one substituent selected from the group consisting of cycloalkyl having 5-8 ring carbon atoms, aryl having 6-10 ring carbon atoms, haloaryl having 6-10 ring carbon atoms, lower alkyl aryl having 6-10 ring carbon atoms in the aryl moiety, lower alkoxy aryl having 6-10 ring carbon atoms in the aryl moiety, nitroaryl having 6-10 ring carbon atoms, halo-nitroaryl having 6-10 ring carbon atoms, aryl-lower alkenyl having 6-10 ring carbon atoms in the aryl moiety, heterocyclic having 5-6 ring members with at least one hetero linking atom selected from the group consisting of O, N, S and mixtures of such hetero atoms, nitro-heterocyclic having 5-6 ring members with at least one hetero linking atom selected from the group consisting of O, N, S and mixtures of such hetero atoms, and mixtures of such substituents, and

with the further proviso that R₁ and R₂ when taken together with the adjacent N atom represent N-containing heterocyclic having 5-6 ring member;

Y is selected from the group consisting of O, S and ##EQU2## and

R₃ and R₄ each respectively is selected from the group consisting of hydrogen, aliphatic having 1-18 carbon atoms, cycloaliphatic having 5-8 ring carbon atoms, araliphatic having 6-10 ring carbon atoms in the corresponding aryl moiety and 1-4 carbon atoms in the aliphatic moiety, aryl having 6-10 ring carbon atoms, and such aliphatic, cycloaliphatic, araliphatic and aryl, respectively, which is substituted with at least one substituent selected from the group consisting of halo, amino, lower alkyl substituted amino, nitro, lower alkyl, lower alkoxy, lower alkylmercapto, aryloxy having 6-10 ring carbon atoms, haloarylmercapto having 6-10 ring carbon atoms, and mixtures of such substituents,

with the proviso that R₃ and R₄ when taken together with the adjacent N atom represent N-containing heterocyclic having 5-6 ring members; and

with the further proviso that when Y is O then R₃ may also be lower alkanoyl;

exhibit strong herbicidal properties.

It is very surprising that the particular active compounds usable according to the present invention not only show a stronger herbicidal activity than the known triazines in pre-emergence application but also show a good herbicidal activity when used according to the post-emergence method. Apart from this, the instant compounds also show marked selective herbicidal properties (see Examples 1 and 2 hereinbelow).

Some of the 1,2,4-triazine-5-ones usable according to the present invention are already known from the literature (cf. Chemische Berichte 97, 2173-2178, 1964).

The following compounds are new: 1,2,4-triazine-5-ones of the above formula (I) wherein correspondingly:

a. R, R₁, R₂ and R₃ are the same as defined above, and

Y is oxygen, provided that R₃ may also be said alkanoyl; or

b. R is aliphatic hydrocarbon having at least two, or at least three, or at least four, or at least five, or at least six, or more (i.e. 2-18 or 3-18 or 4-18 or 5-18 or 6-18, etc.), carbon atoms, or said cycloaliphatic hydrocarbon, araliphatic hydrocarbon, heterocyclic or heterocyclic-alkyl which, in each case, may be substituted with one or more of said halo, nitro, carboalkoxy, alkyl, alkoxy, aryloxy, alkylmercapto, arylmercapto and/or aryl-alkylmercapto, or R is said aryl which is substituted with one or more of said halo, nitro, carboalkoxy, alkyl, alkoxy, aryloxy, alkylmercapto, arylmercapto and/or aryl-alkylmercapto,

R₁, R₂ and R₃ are the same as defined above, and Y is sulfur; or

c. R, R₁ and R₂ are the same as defined above,

R₃ is aliphatic hydrocarbon having at least two, or at least three, or at least four, or at least five, or at least six, or more (i.e. 2-18 or 3-18 or 4-18 or 5-18 or 6-18, etc.), carbon atoms, or said cycloaliphatic hydrocarbon, araliphatic hydrocarbon or aryl which, in each case, may be substituted with one or more of said halo, amino, alkyl substituted amino, nitro, alkyl, alkoxy, alkylmercapto, aryloxy and/or haloarylmercapto, and

Y is sulfur; or

d. R and R₃ are the same as defined above,

R₁ and R₂ each individually is said alkyl or acyl, i.e. alkanoyl, which may be substituted with one or more of said cyano, hydroxy and/or halo, or R₁ and R₂ taken jointly represent said alkylidene or cycloalkylidene, which in each case, may be substituted with one or more of said cycloalkyl, aryl, haloaryl, alkylaryl, alkoxy aryl, nitroaryl, halonitro-aryl, aryl-alkenyl, heterocyclic and/or nitro-heterocyclic, or preferably represent alkylidene having at least two, or at least three, or at least four, or at least five, or at least six, or more (i.e. 2-18 or 3-18 or 4-18 or 5- 18 or 6-18, etc.), carbon atoms which is substituted with said aryl, or preferably represent said unsubstituted cycloalkylidene, or R₁ and R₂, together with the adjacent nitrogen atom, represent said heterocylic, and Y is sulfur; or

e. R is aliphatic hydrocarbon having at least two, or at least three, or at least four, or at least five, or at least six, or more, (i.e. 2-18, 3-18, 4-18, 5-18, 6-18, etc.), carbon atoms, or said cycloaliphatic hydrocarbon, araliphatic hydrocarbon, heterocylic or heterocylic-alkyl which, in each case, may be substituted with one or more of said halo, nitro, carboalkoxy, alkyl, alkoxy, aryloxy, alkylmercapto, arylmercapto and/or aryl-alkylmercapto, or R is said aryl which is substituted with one or more of said halo, nitro, carboalkoxy, alkyl, alkoxy, aryloxy, alkylmercapto, arylmercapto and/or aryl-alkylmercapto, R₁, R₂, R₃ and R₄ are the same as defined above, and Y is --NR₄ ; or

f. R, R₃ and R₄ are the same as defined above, R₁ and R₂ each individually is said alkyl or acyl, i.e., alkanoyl, which may be substituted with one or more of said cyano, hydroxy and/or halo, or R₁ and R₂ taken jointly represent said alkylidene or cycloalkylidene, which, in each case, may be substituted with one or more of said cycloalkyl, aryl, haloaryl, alkylaryl, alkoxy aryl, nitroaryl, halo-nitro-aryl, aryl-alkenyl, heterocyclic and/or nitro-heterocylic, or preferably represent alkylidene having at least two, or at least three, or at least four, or at least five, or at least six, or more (i.e. 2--18 or 3--18 or 4--18 or 5--18 or 6--18, etc.), carbon atoms which is substituted with said aryl, or preferably represent said unsubstituted cycloalkylidene, or R₁ and R₂, together with the adjacent nitrogen atom, represent said heterocyclic, and Y is --NR₄ ; or

g. R, R₁ and R₂ are the same as defined above. R₃ is hydrogen and R₄ is unsubstituted aliphatic hydrocarbon having up to three carbon atoms, or said substituted aliphatic hydrocarbon, substituted or unsubstituted cycloaliphatic hydrocarbon, substituted araliphatic or substituted aryl, or R₃ and R₄ each individually is said substituted or unsubstituted aliphatic hydrocarbon, cycloaliphatic hydrocarbon, araliphatic hydrocarbon or aryl, or R₃ and R₄, together with the adjacent nitrogen atom, represent oxygen-free N-containing heterocyclic having 5-6 ring members which may be substituted with one or more halo, amino, alkyl substituted amino, nitro, alkyl, alkoxy, alkylmercapto, aryloxy, and/or halo arylmercapto, and Y is --NR₄.

The instant new triazinones can be prepared according to the customary methods in the same manner as the known triazinones [see for example Berichte 97, 2173-2178 (1964)].

Advantageously, the instant triazinones influence plant growth and can be used as defoliants, desiccants or herbicides and in particular as weed-killers.

By defoliants and desiccants are meant the customary harvest auxiliaries which are used for removing the leaves from and for drying out the green portions of plants before bringing in the harvest.

By weeds are meant in the widest sense all plants which grow in places where they are undesired.

The instant triazinones can be used as total herbicides for the destruction of weeds, and also as selective herbicides for the destruction of weeds in connection with the cultivation of specific agricultural crops. Whether the instant triazinones act as total herbicides or as selective herbicides depends largely on the concentration thereof which is used as the artisan aware of the present invention will appreciate. Examples of crops for which the triazinones of the instant invention are suitable are cereals (such as oats, barley, rice, maize and in particular wheat), cotton, carrots, snap beans, peas, potatoes, beets, and the like.

As weeds which can be destroyed in accordance with the present invention, there may be mentioned as illustrative examples: dicotyledons, such as mustard (Sinapis), cross (Lepidium), cleaver (Galium), common chickweed (Stellaria), camomile (Matricaria), smallflower Galinsoga (Galinsoga), fathen (Chenopodium), burning nettle (Urtica), groundsel (Senecio); monocotyledons, such as timothy (Phleum), meadow grass (Poa), fescue grass (Festuca), goosegrass (Eleusine), foxtail (Setaria), ryegrass (Lolium), brome grass (Bromus), barnyard grass (Echinochloa), and the like.

The active compounds according to the instant invention can be utilized, if desired, in the form of the usual formulations or compositions with dispersible carrier vehicles, such as solutions, emulsions, suspensions, emulsifiable concentrates, spray powders, pastes, soluble powders, dusting agents, granulates, etc. These are prepared in known manner, for instance by extending the active agents with dispersible liquid diluent carriers and/or dispersible solid carriers optionally with the use of carrier vehicle assistants, e.g., surface-active agents, including emulsifying agents and/or dispersing agents, whereby for example, in the case where water is used as diluent, organic solvents may be added as auxiliary solvents (see Agricultural Chemicals, March 1960, pp. 35-38). The following may be chiefly considered for use as carrier vehicles for this purpose: dispersible liquid diluent carriers, such as aromatic hydrocarbons (for instance, benzene, toluene, xylene, etc.), halogenated, especially chlorinated, aromatic hydrocarbons (for instance, chlorobenzenes), paraffins (for instance, petroleum fractions), chlorinated aliphatic hydrocarbons (for instance, methylene chloride, etc.), alcohols (for instance, methanol, ethanol, propanol, butanol, etc.), ethers, etheralcohols (for instance, glycol monomethyl ether, etc.), amines (for instance, ethanolamine, etc.), amides (for instance dimethyl formamide, etc.), sulfoxides (for instance, dimethyl sulfoxide, etc.), ketones (for instance, acetone, etc.), and water; as well as dispersible finely divided solid carriers, such as ground natural minerals (for instance, kaolins, alumina, silica, chalk, i.e., calcium carbonate, talc, kieselguhr, etc.), and ground synthetic minerals (for instance, highly dispersed silicic acid, silicates, e.g., alkali silicates, etc.); whereas the following may be chiefly considered for use as carrier vehicle assistants, e.g., surface-active agents, for this purpose: emulsifying agents, such as nonionic and anionic emulsifying agents (for instance, polyethylene oxide esters of fatty acids, polyethylene oxide ethers of fatty alcohols, alkyl sulfonates, aryl sulfonates, etc., and especially alkyl arylpolyglycol ethers, magnesium stearate, sodium oleate, etc.); and dispersing agents, such as lignin, sulfite waste liquors, methyl cellulose, etc.

As will be appreciated by the artisan, the active compounds according to the instant invention may be present in such formulations or compositions in the form of mixtures with one another and with other known active substances such as for example known herbicides including ureas, other triazines, uracils, aminotriazole, phenoxy carboxylic acids, benzoic acid, picolinic acid, and the like, if desired.

The substances according to the invention may be employed, therefore, by themselves as the artisan will appreciate, in the form of their compositions with solid or liquid dispersible carrier vehicles or other known compatible active agents, or in the form of particular dosage preparations for specific application made therefrom, such as solutions, emulsions, suspensions, powders, pastes, and granulates which are thus ready for use.

As concerns commercially marketed preparations, these generally contemplate carrier composition mixtures in which the active compound is present in an amount substantially between about 0.1 and 95% by weight, and preferably 0.5 and 90% by weight, of the mixture, whereas carrier composition mixtures suitable for direct application or field application generally contemplate those in which the active compound is present in an amount substantially between about 0.001 and 1.0%, preferably 0.005 and 0.5%, by weight of the mixture. Thus, the present invention contemplates over-all compositions which comprise mixtures of a dispersible carrier vehicle such as a dispersible carrier solid, or a dispersible carrier liquid preferably including a carrier vehicle assistant, e.g., a surface-active agent, such as an emulsifying agent and/or a dispersing agent, and an amount of the active compound which is effective for the purpose in question and which is generally between about 0.001 and 95% by weight of the mixture. Specifically, the active compound may be applied to a surface area, such as in pre-emergence use, in concentrations substantially between about 0.5 and 20 kg per hectare, preferably between about 1 and 10 kg per hectare, although it will be appreciated that in connection with the pre-emergence use of the instant compounds, as well as the post-emergence use thereof, the concentration may be varied within a fairly wide range. However, generally the post-emergance range of concentration will be between about 0.001 and 95%, preferably between about 0.005 and 95%, by weight of the mixture as aforesaid, while the pre-emergence range will be between about 0.5 and 20, preferably between about 1 and 10, kg per hectare, as aforesaid.

Furthermore, the present invention contemplates methods of selectively controlling or combatting undesired plants, e.g., weeds and the like, which comprise applying to at least one of (a) such weeds and (b) their habitat, a herbicidally effective amount of the particular active compound of the invention alone or together with a carrier vehicle as noted above. The instant formulations or compositions are applied in the usual manner, for example, by spraying, atomizing, scattering, dusting, watering, sprinkling, dispersing, and the like, whether for pre-emergence application to the soil or post-emergence application to the weeds.

The following Examples are given for the purpose of illustrating, without limiting, the utility of the instant invention.

EXAMPLE 1

    Pre-emergence test                                                             Solvent:  5 parts by weight acetone                                            Emulsifier:                                                                              1 part by weight benzyloxypolyglycol ether                      

To produce a suitable preparation of the particular active compound, 1 part by weight of such active compound is mixed with the stated amount of solvent, the stated amount of emulsifier is then added and the resulting concentrate is thereafter diluted with water to the desired final concentration.

Seeds of the test plants are sown in normal soil and, after 24 hours, watered with the preparation of the given active compound. It is expedient to keep constant the amount of water per unit area. The concentration of the particular active compound in the preparation is of no importance, only the amount of active compound applied per unit area being decisive. After three weeks, the degree of damage to the test plants is determined and characterized by the values 0-5, which have the following meaning:

    0      no effect                                                               1      slight damage or delay in growth                                        2      marked damage or inhibition of growth                                   3      heavy damage and only deficient development                                    or only 50% emerged                                                     4      plants partially destroyed after germination                                   or only 25% emerged                                                     5      plants completely dead or not emerged.                             

The particular active compounds, the amounts applied and the results obtained can be seen from the following Table 1:

                                      Table 1                                      __________________________________________________________________________     Pre-emergence test                                                             Active compound    Active compound                                                                         Oats Wheat                                                                              Cotton                                                                             Sinapis                                                                             Cheno-                                                                             Galin-                                                                             Echino-                                                                             Avena                                  used in kg/hec-            podium                                                                             soga                                                                               chloa                                                                               fatua                                  tare                                                        __________________________________________________________________________        Cl              5        4    4   5   5    5   5   3-4  5                      |                                                                  (A)                                                                               C               2.5      4    3   4   5    5   5   3    4                      ∠                                                                        NN                                                                             H∥|H                                                                         1.25     3    2   3   5    5   5   2    3                      ∠N--CC--N∠                                                         ∠                                                                        H.sub.5 C.sub.2 NC.sub.2 H.sub.5                                               (known from)                                                                   (Belgian Patent 540,590)                                                                       5        5    5   3   5    5   5   5    5                                      2.5      5    5   1   5    5   5   5    5                   (1a)                                                                                              1.25     3    2   0   5    5   5   4-5  4                                      5        5    5   5   5    5   5   5                           O                                                                              ∥                                                                     C               2.5      5    5   5   5    5   5   5                           ∠                                                                     (2)                                                                               CN--NH.sub.2                                                                   ||                                                           NC--SCH.sub.3   1.25     4-5  4-5 5   5    5   5   5                           ∠                                                                        N                                                                              (new compound)                                                                                 10       3    1   0   5    5   5   5                           O                                                                              ∥                                                                     C                                                                              ∠         5        2    0   0   5    5   5   4                           CN--NH.sub.2                                                                (3)                                                                               ||                                                           NC--SC.sub.2 H.sub.5                                                                           2.5      1    0   0   4    5   5   3                           ∠                                                                        N                                                                              (new compound)                                                              __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 1A for Formula (I) act in the same way as active compound (1a):

                                      Table 1A                                     __________________________________________________________________________                      O                                                                              ∥                                                                     C                                                                              ∠R.sub.1                                                                 R--CN--N∠(I)                                                             ∥|R.sub.2                                                    NC--Y--R.sub.3                                                                 ∠                                                                        N                                                             R            R.sub.1                                                                              R.sub.2                                                                             R.sub.3      R.sub.4                                                                          Y                                       __________________________________________________________________________     (4)          H     H    --CH.sub.3     S new compound                          (5)          H     H    --CH.sub.3     S new compound                          (6)          --CO--CH.sub.3                                                                       --COCH.sub.3                                                                        --CH.sub.3     S new compound                          (7)          H     H    --C.sub.2 H.sub.5                                                                           H N new compound                          (8)          --COCH.sub.3                                                                         H    --CH.sub.3     S new compound                          (9)          H     H    --CH.sub.3   H N new compound                          (10)         H     H    --CH.sub.3   H N new compound                              CH.sub.3                                                                   (11)                                                                               ∠CH--CH.sub.2                                                                     H     H    --CH.sub.3     S new compound                              CH.sub.3                                                                   (12)         H     H    --CH.sub.2 --CH.sub.2 --CH.sub.3                                                            H N new compound                          (13a)        H     H    --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2                                                    N-                                      __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 1B for Formula (I) above act in the same way as active compound (2), which has a pronouncedly total-herbicidal action:

                                      Table 1B                                     __________________________________________________________________________     R          R.sub.1   R.sub.2                                                                           R.sub.3                                                                            R.sub.4                                                                            Y                                              __________________________________________________________________________     (14)                    --CH.sub.3                                                                             S new compound                                 (15)                    --CH.sub.3                                                                             S new compound                                 (16)       H         H  --CH.sub.3                                                                         --CH.sub.3                                                                         N new compound                                 (17)       =C(CH.sub.3).sub.2                                                                          --CH.sub.3                                                                             S new compound                                 (18)                    --CH.sub.3                                                                             S new compound                                 (19)       =CH--CH(CH.sub.3).sub.2                                                                     --CH.sub.3                                                                             S new compound                                 (20)       --CHOH--CCl.sub.3                                                                        H  --CH.sub.3                                                                             S new compound                                 (21)                                                                               (CH.sub.3).sub.2 =CH--                                                                H         H  --CH.sub.3                                                                             S new compound                                 (22)                                                                               C.sub.2 H.sub.5 --                                                                    H         H  --CH.sub.3                                                                             S new compound                                 (23)                                                                               iso--C.sub.5 H.sub.11 --                                                              H         H  --CH.sub.3                                                                             S new compound                                 (24)                                                                               C.sub.6 H.sub.13 n-                                                                   H         H  --CH.sub.3                                                                             S new compound                                 __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 1C for Formula (I) above act in the same way as active compound (3), which exhibits selectively herbicidal action in wheat and cotton:

    R         R.sub.1                                                                           R.sub.2 R.sub.3   R.sub.4                                                                          Y                                             __________________________________________________________________________                          --CH.sub.2 --CH.sub.2                                     (25)      H  H       ∠CH.sub.2                                                                            N new compound                                                     --CH.sub.2 --CH.sub.2                                     (26)      H  H       --CH.sub.2 --CH=CH.sub.2                                                                 H N new compound                                (27)                 --CH.sub.3  S new compound                                (28)                 --CH.sub.3  S new compound                                __________________________________________________________________________

EXAMPLE 2

    Post-emergence test                                                            Solvent: 5 parts by weight acetone                                             Emulsifier:                                                                             1 part by weight benzyloxypolyglycol ether                       

To produce a suitable preparation of the particular active compound, 1 part by weight of such active compound is mixed with the stated amount of solvent, the stated amount of emulsifier is then added and the resulting concentrate is thereafter diluted with water to the desired final concentration.

Test plants which have a height of about 5--15 cm. are sprayed with the preparation of the given active compound until just dew moist. After three weeks, the degree of damage to the plants is determined and characterized by the values 0-5, which have the following meaning:

    0         no effect                                                            1         a few slightly burnt spots                                           2         marked damage to leaves                                              3         some leaves and parts of stalks                                                 partially dead                                                      4         plant partially destroyed                                            5         plant completely dead                                           

The particular active compounds, their concentrations and the results obtained can be seen from the following Table 2:

                                      Table 2                                      __________________________________________________________________________     Post-emergence test                                                               Active compound    Concentration of                                                                          Wheat                                                                              Sinapis                                                                             Cheno-                                                                             Stella-                                                                             Daucus                                                                             Galin-                                                                             Echin-                                    active compound %   podium                                                                             ria      soga                                                                               chloa               __________________________________________________________________________        Cl                 0.1        4   5    5   5    3   4-5 4                      |                                                                     C                  0.05       2   5    5   5    1   4   3                      ∠                                                                        NN                                                                          (A')                                                                              H∥|H                                                                            0.025      1   5    4   5    0   2   2                      ∠N--CC--N∠                                                         H.sub.5 C.sub.2 ∠C.sub.2 H.sub.5                                                            0.01       0   4    3   4    0   1   1                      N                                                                              (known from                                                                    Belgian Patent 540,590)                                                                           0.1        4   5    5   5    5   5   5                                         0.05       2   5    5   5    5   5   5                   (1a')                 0.025      1   5    5   5    5   5   5                                         0.01       0   5    5   5    5   5   5                   Table 2'                                                                       __________________________________________________________________________     Post-emergence test                                                               Active compound      Concentration                                                                         Wheat                                                                              Carrots                                                                            Snap                                                                                Sina-                                                                            Cheno-                                                                             Stella-                                                                            Galin-                                                                             Echino-                                      of active com- Beans                                                                              pis                                                                               podium                                                                             ria soga                                                                               chloa                                        pound %                                                __________________________________________________________________________        O                                                                              ∥                                                                     C                    0.05   5   5   5   5  5   5   5   5                       ∠                                                                        (CH.sub.3).sub.2 CH--CN--NH.sub.2                                           (21')                                                                             ∥| 0.025  5   5   5   5  5   5   5   5                       NC--SCH.sub.3                                                                  ∠              0.01   4-5 5   5   5  5   5   5   5                       N                                                                              (new compound)                                                                 O                                                                              ∥                                                                     C                    0.05   1   5   1   5  5   5   5   5                       ∠                                                                        CN--N=CH                                                                    (28')                                                                             ∥| 0.025  0   5   0   5  5   5   5   5                       C--SCH.sub.3         0.01   0   5   0   5  5   5   4   4                       ∠                                                                        N                                                                              (new compound)                                                                 O                                                                              ∥                                                                     C                    0.05   0   0   5   5  5   5   5   5                       ∠                                                                        CN--NH.sub.2                                                                (26')                                                                             ∥| 0.025  0   0   5   5  5   5   5   4                       NC                                                                             ∠|    0.01   0   0   4   5  5   4   5   5                       NNH--CH.sub.2 --CH=CH.sub.2                                                    (new compound)                                                              __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 2A for Formula (I) above act in the same way as active compound (1a):

                                      Table 2A                                     __________________________________________________________________________                          O                                                                              ∥                                                                     C                                                                              ∠R.sub.1                                                                 R--CN--N∠                                                                ∥|R.sub.2                                                    ∥|                                                           NC--Y--R.sub.3                                                                 ∠                                                                        N                                                         R                 R.sub.1                                                                           R.sub.2                                                                           R.sub.3        R.sub.4                                                                           Y                                    __________________________________________________________________________     (29a)                                                                               CH.sub.3 --  H  H  --CH.sub.3        S                                    (4')              H  H  --CH.sub.3        S new compound                       (30)              H  H  --CH.sub.3        S new compound                       (31)              H  H  --CH.sub.2 --C.tbd.CH                                                                            S new compound                       (32)              H  H  --CH.sub.2 --CH=CH.sub.2                                                                         S new compound                       (7')              H  H  --C.sub.2 H.sub.5                                                                             H  N new compound                       (33)              H  H  --CH.sub.3        O new compound                       (9')              H  H  --CH.sub.3     H  N new compound                       (10')             H  H  -- CH.sub.3    H  N new compound                            CH.sub.3                                                                  (11')                                                                               ∠CH--CH.sub.2 --                                                                      H  H  --CH.sub.3        S new compound                            CH.sub.3                                                                  (34) CH.sub.3 --  H  H  --CH.sub.3     H  N new compound                       (13a')            H  H  --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2                                                   N-                                   __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 2B for Formula (I) above act in the same way as active compound (21), which has a pronouncedly total-herbicidal action:

                                      Table 2B                                     __________________________________________________________________________     R          R.sub.1 R.sub.2                                                                           R.sub.3                                                                            R.sub.4                                                                            Y                                                __________________________________________________________________________     (14')                 --CH.sub.3                                                                             S new compound                                   (16')      H       H  --CH.sub.3                                                                         --CH.sub.3                                                                         N new compound                                   (2')       H       H  --CH.sub.3                                                                             S new compound                                   (20')      --CHOH--CCl.sub.3                                                                      H  --CH.sub.3                                                                             S new compound                                   (23')                                                                               iso C.sub.5 H.sub.11 --                                                              H       H  --CH.sub.3                                                                             S new compound                                   __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 2C for Formula (I) above act in the same way as active compound (28), which exhibits a pronouncedly selective-herbicidal action in snap beans and wheat:

                                      Table 2C                                     __________________________________________________________________________     R          R.sub.1                                                                             R.sub.2                                                                            R.sub.3                                                                            R.sub.4                                                                          Y                                                    __________________________________________________________________________     (15')               --CH.sub.3                                                                           S new compound                                       (27')               --CH.sub.3                                                                           S new compound                                       (19')      =CH--CH(CH.sub.3).sub.2                                                                 --CH.sub.3                                                                           S new compound                                        (22')                                                                              C.sub.2 H.sub.5 --                                                                   H    H   --CH.sub.3                                                                           S new compound                                       (24')                                                                               C.sub.6 H.sub.13 n--                                                                 H    H   --CH.sub.3                                                                           S new compound                                       __________________________________________________________________________

The following instant compounds having the appropriate substituents designated in Table 2D for Formula (I) above act in the same way as active compound (26), which has a pronouncedly selective-herbicidal action in wheat and carrots:

                                      Table 2D                                     __________________________________________________________________________     R          R.sub.1  R.sub.2                                                                            R.sub.3                                                                               R.sub.4                                                                          Y                                             __________________________________________________________________________     (3')       H        H   --C.sub.2 H.sub.5                                                                     S new compound                                  (17')      =C(CH.sub.3).sub.2                                                                          --CH.sub.3                                                                            S new compound                                  (18')                   --CH.sub.3                                                                            S new compound                                  (35)                    --CH.sub.3                                                                            S new compound                                  __________________________________________________________________________

EXAMPLE 3 Defoliant test

There is prepared, in the same manner as described in Example 1, an active compound preparation which contains 0.05% of

(1a") 3-methylthio-4-amino-6-phenyl-1,2,4-triazine-5-one.

A field of dwarf beans is sprayed with this preparation of the active compound so that the dwarf beans themselves are only just dripping wet.

After 8 days the leaves are completely dried up.

The harvesting of the beans is quite considerably facilitated in this manner.

The same action is exercised by:

(29a') 3-methylthio-4-amino-6-methyl-1,2,4-triazine-5-one

(7") 3-ethylamino-4-amino-6-phenyl-1,2,4-triazine-5-one

(33') 3-methoxy-4-amino-6-phenyl-1,2,4-triazine-5-one.

The following Examples, by way of illustration and not limitation, contain detailed particulars of various methods of preparation of different 1,3,4-triazine-5-ones of the present invention. They exemplify methods which are in accordance with known types.

EXAMPLE 4

Preparation of 3-hydroxy-1,2,4-triazine-5-ones with different substituents in the 6-position:

74g carbohydrazide are heated to 90°-100°C with 600 ml water. 74g pyroracemic acid are added dropwise, with stirring. After 3 hours, filtering off cold with suction is effected to yield:

36. 3-hydroxy-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 159°C (from alcohol).

In analogous manner there are also obtained for instance:

37. 3-hydroxy-4-amino-6-benzyl-1,2,4-triazine-5-one, m.p. 173°C

38. 3-hydroxy-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 195°C

EXAMPLE 5 Modification of 3-hydroxy-1,2,4-triazine-5-ones

20.4g 3-hydroxy-4-amino-6-phenyl-1,2,4-triazine-5-one (38') are dissolved in 300 ml dimethylformamide and 50 cc 210 sodium methylate solution. The excess methanol is then distilled off in a vacuum, and 13.5g β-diethylaminoethyl chloride are added dropwise at 80°C, with stirring, to the remaining dimethylformamide solution. After a short time the reaction mixture is neutral to phenolphthalein. The solvent is distilled off under reduced pressure. The residue is taken up in water and methylene chloride, and the organic phase is separated and fractionally distilled to yield:

39. 3-(β-diethylaminoethoxy)-4-amino-6-phenyl-1,2,4-triazine-5-one, b.p. 160°C/0.01 mm Hg.

EXAMPLE 5A

Substitution products of 3-hydroxy-1,2,4-triazine-5-ones, indirect method of preparation:

2.3 g sodium are added to 500 ml methanol whereby a sodium methylate solution is formed. 23.4g 3-methylthio-4-amino-6-phenyl-1,2,4-triazine-5-one (1a) and 6.5 ml methyl iodide are added. The mixture is boiled for one hour. When cooling down the mixture, a crystalline precipitate separates. The crystals are removed by suction and recrystallized from methanol and optionally once more from acetic acid ester. The 3-methoxy-4-amino-6-phenyl-1,2,4-triazin-5-one (33") thus obtained has a melting point of 167°C.

In analogous manner to Example 5A, there are also obtained for instance:

40. 3-methoxy-4-amino-6-methyl-1,2,4-triazine-5-one, m.p.124°C

41. 3-ethoxy-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p.137°C

42. 3-butoxy-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 77°C

43. 3-hexoxy-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 77°C

44. 3-allyloxy-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 75°C

45. 3-propargyloxy-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 115°C

46. 3-(3' ,3'-dichlorallyloxy)-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 84°C

47. 3-(β-diethylaminoethoxy)-4-amino-6-methyl-1,2,4-triazine-5one, b.p. 121°C/0.01 mm Hg.

48. 3-(β-diethylaminoethoxy)-4-amino-6-benzyl-1,2,4-triazine-5-one, b.p. 165°C, 0.01 mm Hg.

EXAMPLE 6

Modification of 3-hydroxy-4-amino-1,2,4-triazino-5-ones:

10g 3-hydroxy-4-amino-6-methyl-1,2,4-triazine-5-one (36') are boiled for 3 hours with 100 ml acetic anhydride. The excess acetic anhydride serving as solvent is distilled off in a vacuum and the residue is dissolved in, and allowed to crystallize (without filtration) from, alcohol to yield:

49. 3-acetoxy-4-diacetylamino-6-methyl-1,2,4-triazine-5-one, m.p. 212°C.

EXAMPLE 7

Preparation of 3-mercapto-1,2,4-triazine-5-ones with different substituents in 6-position:

When 14g thiocarbohydrazide and 14g furoylformic acid are reacted according to Example 4, there is obtained

50. 3-mercapto-4-amino-6-furyl-1,2,4-triazine-5-one, m.p. 244°C.

In analogous manner there can also be prepared for instance:

51. 3-mercapto-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 180°C

52. 3-mercapto-4-amino-6-benzyl-1,2,4-triazine-5-one, m.p. 205°C

53. 3-mercapto-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 242°C

54. 3-mercapto-4-amino-6-isobutyl-1,2,4-triazine-5-one, m.p. 156°C

55. 3-mercapto-4-amino-6-(4'-chlorphenyl)-1,2,4-triazine-5-one, m.p. 264°C

56. 3-mercapto-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 224°C

57. 3-mercapto-4-amino-6-ethyl-1,2,4-triazine-5-one, m.p. 123°C

58. 3-mercapto-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 140°C

59. 3-mercapto-4-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 166°C

60. 3-mercapto-4-amino-6-isopentyl-1,2,4-triazine-5-one, m.p. 143°C

61. 3-mercapto-4-amino-6-hexyl-1,2,4-triazine-5-one, m.p. 126°C

62. 3-mercapto-4-amino-6-carbethoxy-methyl-1,2,4-triazine-5-one, m.p. 134°C

63. 3-mercapto-4-amino-6-(4'-methyl-phenyl)-1,2,4-triazine-5-one, m.p. 222°C

64. 3-mercapto-4-amino-6-(3'-methyl-phenyl)-1,2,4-triazine-5-one, m.p. 214°C

65. 3-mercapto-4-amino-6-(3'-methoxy-phenyl)-1,2,4-triazine-5-one, m.p. 200°C

66. 3-mercapto-4-amino-6-(3'-chloro-phenyl)-1,2,4-triazine-5-one, m.p. 242°C

67. 3-mercapto-4-amino-6-(4'-nitro-phenyl)-1,2,4-triazine-5-one, m.p. 222°C

68. 3-mercapto-4-amino-6-benzylmercapto-methyl-1,2,4-triazine-5-one, m.p. 169°C

69. 3-mercapto-4-methylamino-6-phenyl-1,2,4-triazine-5-one, m.p. 129°C

70. 3-mercapto-4-amino-6-styryl-1,2,4-triazine-5-one, m.p. 258°C (decomp.)

EXAMPLE 8 Modification of 3-mercapto-1,2,4-triazine-5-ones

When 38.7g 3-mercapto-4-amino-6-methyl-1,2,4-triazine-5-one (51') are reacted according to Example 5 in dimethylformamide with sodium methylate and β-diethylamino-ethyl chloride, there is obtained

71. 3-(β-diethylaminoethylthio)-4-amino-6-methyl-1,2,4-triazine-5-one, b.p. 141°C/0.01 mm Hg.

In analogous manner there are also obtained for instance:

72. 3-(β-diethylaminoethylthio)-4-amino-6-phenyl-1,2,4-triazine-5-one as HCl salt, m.p. 220°C

29a". 3-methylthio-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 166°C

4". 3-methylthio-4-amino-6-benzyl-1,2,4-triazine-5-one, m.p. 205°C

1a'". 3-methylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 188°C

30'. 3-methylthio-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 183°C

73. 3-methylthio-4-amino-6-(4'-chlorphenyl)-1,2,4-triazine-5 -one, m.p. 182°C

5'. 3-methylthio-4-amino-6-furyl-1,2,4-triazine-5-one, m.p. 225°C

74. 3-allylthio-4-amino-6-furyl-1,2,4-triazine-5-one, m.p. 165°C

75. 3-propynylthio-4-amino-6-furyl-1,2,4-triazine-5-one, m.p. 174°C

31'. 3-propynylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 159°C

32'. 3-allylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 137°C

76. 3-allylthio-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 157°C

77. 3-isopropylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 150°C

78. 3-dodecylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 103°C

79. 3-benzylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 169°C

80. 3-(4'-chlorbenzylthio)-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 184°C

81. 3-(4'-chlorbenzylthio)-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 186°C

82. 3-isobutylthio-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 65°C

3". 3-ethylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 114°C

83. 3-propylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 119°C

84. 3-butylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 100°C

85. 3-hexylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 87°C

86. 3-cyclohexylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 160°C

87. 3-(2,3-dichlorallylthio)-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 215°C

88. 3-octadecylthio-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 94°C

22". 3-methylthio-4-amino-6-ethyl-1,2,4-triazine-5-one, m.p. 120°C

21'. 3-methylthio-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 123°C

2". 3-methylthio-4-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 154°C

11". 3-methylthio-4-amino-6-isobutyl-1,2,4-triazine-5-one, m.p. 66°C

23". 3-methylthio-4-amino-6-isopentyl-1,2,4-triazine-5-one, stiff oil

24". 3-methylthio-4-amino-6-n-hexyl-1,2,4-triazine-5-one, m.p. 63°C

89. 3-methylthio-4-amino-6-styryl-1,2,4-triazine-5-one, m.p. 218°C

90. 3-methylthio-4-amino-6-carbomethoxy-methyl-1,2,4-triazine-5-one, m.p. 112°C

91. 3-methylthio-4-amino-6-(3'-methyl-phenyl)-1,2,4-triazine-5-one, m.p. 160°C

92. 3-methylthio-4-amino-6-(4'-methyl-phenyl)-1,2,4-triazine-5-one, m.p. 185°C

93. 3-methylthio-4-amino-6-(3'-chloro-phenyl)-1,2,4-triazine-5-one, m.p. 219°C

94. 3-methylthio-4-amino-6-(3'-methoxy-phenyl)-1,2,4-triazine-5-one, m.p. 142°C

95. 3-methylthio-4-amino-6-benzylmercapto-methyl-1,2,4-triazine-5-one, m.p. 110°C

EXAMPLE 9 Modification of 3-methylthio-1,2,4-triazine-5-ones

11.7g 3-methylthio-4-amino-6-methyl-1,2,4-triazine-5-one (29a'") and 15g p-chloraniline are stirred together with each other for 1 hour at 150°C and then 1 hour at 160°C. After this the melt has become solid. After cooling, the melt is boiled out with ether. The insoluble portion is dissolved in, and allowed to crystallize (without filtration) from, dimethylformamide. There is obtained

96. 3-(4'-chlorophenylamino)-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 242°C:

When, instead of p-chloraniline, an amine is used with which, because of its volatility, the above-mentioned reaction temperatures cannot be achieved in an open vessel, the work is carried out in an autoclave.

The following compounds for instance can also be prepared in this manner:

97. 3-(3',4'-dichlorphenylamino)-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 228°C

98. 3-(2',4'-dichlorphenylamino)-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 218°C

99. 3-(β-diethylaminoethylamino)-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 108°C

34'. 3-methylamino-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 180°C

7'". 3-ethylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 158°C

9". 3-methylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 212°C

100a. 3-n-butylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 182°C

12'. 3-n-propylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 176°C

13a". 3-morpholino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 163°C

101. 3-(β-diethylaminoethylamino)-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 130°C

102a. 3-benzylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 177°C

103. 3-(4'-chloranilino)-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 257°C

104. 3-(4'-chloranilino)-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 212°C

105. 3-(β-diethylaminoethylamino)-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 148°C

10". 3-methylamino-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 159°C

106. 3-benzylamino-4-amino-6-(4'-chlorbenzyl)-1,2,4-triazine-5-one, m.p. 123°C

107. 3-(β-diethylaminoethylamino)-4-amino-6-(4'-chlorphenyl)-1,2,4-triazine-5-one, m.p. 184°C

25'. 3-piperidino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 149°C

26". 3-allylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 168°C

108. 3-octadecylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 129°C

109. 3-n-hexylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 164°C

110. 3-[2'-(ethyl)-hexylamino]-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 131°C

16". 3-dimethylamino-4-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 133°C

EXAMPLE 10 Preparation of 3,4-diamino-1,2,4-triazine-5-ones

43g 1,3-diamino-guanidine-hydrobromide are dissolved in a little water; 38g benzoylformic acid, dissolved in methanol, are added. After brief heating, cooling is effected followed by neutralization with bicarbonate. There is obtained in this way

112a. 3,4-diamino-6-phenyl-1,2,4-triazine-5-one, m.p. 258°C.

In analogous manner, with p-chlorbenzoylformic acid there is prepared

113. 3,4-diamino-6-(4'-chlorphenyl)-1,2,4-triazine-5-one, m.p. 255°C.

EXAMPLE 11

Preparation of 3-methylthio-4-acetylamino-6-phenyl-1,2,4-triazine-5-one: 20g 3-methylthio-4-amino-6-phenyl-1,2,4-triazine-5-one (1a"") are boiled for 9 hours with 100 cc acetic anhydride. The excess anhydride is then distilled off under reduced pressure. The crystalline residue is dissolved in, and allowed to crystallize (without filtration) from, alcohol to yield:

6". 3-methylthio-4-diacetylamino-6-phenyl-1,2,4-triazine-5-one, m.p. 122°C

20g of this last mentioned compound are dissolved in alcohol and treated at 20°C with an equivalent of 2N sodium hydroxide solution, which is consumed very rapidly. After working up, there is obtained

8'. 3-methylthio-4-acetylamino-6-phenyl-1,2,4-triazine-5-one, m.p. 213°C.

EXAMPLE 12

Modification of 3-methylthio-4-amino-1,2,4-triazine-5-one at the amino group:

23.4g 3-methylthio-4-amino-6-phenyl-1,2,4-triazine-5-one (1a""') are dissolved in 100 ml chlorobenzene with 17.8g freshly distilled chloral and 0.2g p-toluenesulfonic acid. The reaction mixture is heated for 1 hour on a water-bath and then for 45 minutes under reflux. A small amount of undissolved matter is filtered off hot. From the filtrate there crystallizes

20". 3-methylthio-4-(βtrichloro-α-hydroxy-ethyl)-amine-6-phenyl-1,2,4-triazine-5-one.

After dissolving in, and allowing to crystallize (without filtration) from, chloroform, such product has: m.p. 147°C (decomp.).

EXAMPLE 12A

Modification of 3-methylthio-4-amino-1,2,4-triazine-5-ones by -ylidene substitution at the 4-position amino group:

11.7g 3-methylthio-4-amino-6-phenyl-1,2,4-triazine-5-one (1a""") and 5.6g cyclohexanone are boiled for 1 hour in 50 ml methanol after the addition of 5 drops of concentrated hydrochloric acid. The crystals which have precipitated during cooling are dissolved in, and allowed to recrystallize (without filtration) from, methanol to yield:

18". 3-methylthio-4-cyclohexylidene-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 140°C.

In analogous manner, there are also obtained for instance:

15". 3-methylthio-4-benzylidene-amino-6-phenyl-1,2,4-triazine-5-one, m.p. 180°C

14". 3-methylthio-4-(furfur-2'-ylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 172°C

35'. 3-methylthio-4-(5'-nitro-furfur-2'-ylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 207°C

17". 3-methylthio-4-(prop-2'-ylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 152°C

19". 3-methylthio-4-(isobutylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 136°C

27". 3-methylthio-4-(1'-phenyl-eth-1'-ylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 154°C

28". 3-methylthio-4-(pyrid-2'-yl-methylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 205°C

EXAMPLE 13

In the same manner as described in Example 4, using corresponding molar amounts of the appropriate starting materials, the following compounds are produced:

114. 3-naphth-1'-yl-n-propyloxy-4-isooctylamino-6-hexadec-1"-yl-1,2,4-triazine-5-one

115. 3-phenyl-tert-butyloxy-4-formylamino-6-vinyl-1,2,4-triazine-5-one

116. 3-naphth-1'-yloxy-4-butanoylamino-6-dodec-11"-en-1"-yl-1,2,4-triazine-5-on

117. 3-cyclopent-3'-enyloxy-4-(2"-cyano-prop-1"-yl-amino)-6-prop-2'"-yn-1'"-yl-1,2,4-triazine-5-one

118. 3-(3'-nitro-4'-bromo-5'-fluoro-hept-6'-yn-1'-yloxy)-4-(α-bromo-.alpha.-fluoro-acetylamino)-6-octadec-9"-yn-1"-yl-1,2,4-triazine-5-one

119. 3-(3'-iodo-5'-fluoro-cyclohexyloxy)-4-hex-1"-ylidene-amino-6-naphth-1'"-ylmethyl-1,2,4-triazine-5-one

120. 3-[β-(3'-methoxy-4'-sec-butyl-5'-chloro-phenyl) ethyloxy]-4-cyclopentylidene-amino-6-naphth-1"-ylisopropyl-1,2,4-triazine-5-one

121. 3-(4'-phenoxynaphth-1'-yloxy-4-(3"-phenyl-n-prop-1"-ylidene-amino)-6-naphth-1'"-yl-n-but-2""-en-1""-yl-1,2,4-triazine-5-one

122. 3-(β-naphth-1'-ylethylmercapto)-4-[5"-(3'"-chloro-4'"-bromo-5'"-iodo-phenyl) pent-1"-ylidene-amino]-6-naphth-1""-yl-1,2,4--triazine-5-one

123. 3-phenyl-isopropylmercapto-4-[2'-(4"-n-butoxyphenyl) eth-1'-ylidene-amino]-6-(α-tetrahydrofuryl)-1,2,4-triazine-5-one

124. 3-naphth-1'-ylmercapto-4-[4"-(4"'-nitronaphth-1'"-yl) cyclohex-1"-ylidene-amino]-6-piperid-1""-yl-1,2,4-triazine-5-one

125. 3-cyclohex-3'-enylmercapto-4-piperid-1"-yl -6-morpholino-1,2,4-triazine-5-one

126. 3-(5'-chloro-5'-bromo-10'-nitro-dec-9'-en-1'-yl-mercapto)-4-o-thiazolidin-2"-yl-6-thianyl-1,2,4-triazine-5-one

127. 3-[3'-(3"-ethoxy-5"-isopropyl-naphth-1"-yl)-prop-1'-ylmercapto]-4-(3'"-.DELTA.²,5 -pyran-2""-yl-cyclopent-1""-ylidene-amino)-6-(10""'-bromodec-1""'-yl)-1,2,4-trazine-5-one

128. 3-(3'-naphth-1'-yloxy-phenylmercapto)-4-pyrazol-1"-yl-6-(3'"-iodo-4'"-fluoro-cyclopent-2'"-enyl)-1,2,4-triazine-5-one

129. 3-(β-phenyl-ethylamino)-4-(1',2',3'-dioxazol-3'-yl)-6-(3"-isopropylmercaptoallyl)-1,2,4-triazine-5-one

130. 3-[N-(2'-nitro-3'-iodo-4'-chloro-5'-ethyl-phenyl)-N-cyclohexyl-amino]-4-(1", 2"-dihydro-pyrimidin-1"-yl)-6-(4'41 -phenyloxy pyrid-2'"-yl)-1,2,4-triazine-5-one

131. 3-[N-(3'-n-propoxy-4'-phenyloxy-cyclohexyl)-N-isohexyl-amino]-4-pyrrol-1"-yl-6-(4'"-phenylmercapto-but-3'"-yn-1'"-yl)-1,2,4-triazine-5-one

132. 3-(4'-naphth-1"-yloxy phenyl-amino)-4-(1'",2'",5'"-pyrrodiazol-1'"-yl)-6-(3""-naphth-1""'-ylmercapto-4""-carbomethoxy α-furyl)-1,2,4-triazine-5-one

133. 3-(metathiazolidino)-4-(1',2',3'-thiodiazolidin-2'-yl)-6-[3"-(3'"-chloro-4'"-nitro-5'"-ethoxy-phenyl)-prop-1'-yl)-1,2,4-triazine-5-one

EXAMPLE 14

Preparation of 3-hydroxy-1,2,4-triazine-5-ones with different substituents at the 6-position:

In analogous manner to the procedure of Example 4, the following compounds are also obtained;

134. 3-hydroxy-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 166°C

135. 3-hydroxy-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 124°C

EXAMPLE 15

Modification of 3-hydroxy-1,2,4-triazine-5-ones:

In analogous manner to the procedure of Example 5A, the following compounds are also obtained:

136. 3-methoxy-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 114°C

137. 3-methoxy-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 173°C

138. 3-methoxy-4-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 131°C

EXAMPLE 16

Modification of 3-methoxy-4-amino-1,2,4-triazine-5-one at the 4-position amino group (analogous to Example 12):

9.9g 3-methoxy-4-amino-6-isopropyl-1,2,4-triazine-5-one (136) are dissolved at 40°C with stirring in 50 ml anhydrous chloroform and then reacted with 7.4g freshly distilled chloral and 0.2g of trichloroacetic acid. After subsidence of the exothermic reaction, crystallization is completed by adding 150 ml of petroleum ether. In this manner, there is obtained:

139. 3-methoxy-4-(β-trichloro-α-hydroxy-ethyl)-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 165°C

EXAMPLE 17

Preparation of 3-mercapto-1,2,4-triazine-5-ones with different substituents at the 6-position:

In analogous manner to the procedure of Example 7, the following compounds are also obtained:

140. 3-mercapto-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 214°C

141. 3-mercapto-4-amino-6-n-propyl-1,2,4-triazine-5-one, m.p. 128°C

142. 3-mercapto-4-amino-6-(adamant-2'-yl)-1,2,4-triazine-5-one, m.p. 279°C (decomp.)

143. 3-mercapto-4-amino-6tetrahydropyran-2'-yl-a,2,4, triazine-5-one, m.p. 152°C

144. 3-mercapto-4-amino-6-(furfur-2'-yl)-1,2,4-triazine-5-one, m.p. 152°C

145. 3-mercapto-4-amino-6-(pyrid-2'-yl-methyl)-1,2,4-triazine-5-one, m.p. 240°C (decomp.)

146. 3-mercapto-4-amino-6-(pyrid-40'-yl-methyl)-1,2,4-triazine-5-one, m.p. 215°C (decomp.)

EXAMPLE 18

Modification of 3-mercapto-1,2,4-triazine-5-ones:

In analogous manner to the procedure of Example 8, the following compounds are also obtained:

147. 3-methylthio-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 127°C

148. 3-ethylthio-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 115°C

149. 3-n-butylthio-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 78°C

150. 3-(α-allylthio)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 81°C

151. 3-isopropylthio-4-amino-6-methyl-1,2,4-triazine-5-one, m.p. 149°C

152. 3-isopropylthio-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 70°C

153. 3-methylthio-4-amino-6-n-propyl-1,2,4-triazine-5-one, m.p. 81°C

154. 3-methylthio-4-amino-6-adamant-2'-yl-1,2,4-triazine-5-one, m.p. 235°C (decomp.)

155. 3-ethylthio-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 82°C

156. 3-(α-allylthio)-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 91°C

157. 3-(β-n-butylthio-ethylthio)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 56°C

158. 3-propargylthio-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 103°C

159. 3-(4'-chloro-phenylthiomethylthio)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 116°C

160. 3-(β-ethylthio-ethylthio)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 87°C

161. 3-(β-ethylthio-ethylthio)-4-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 77°C

162. 3-(β-ethylthio-ethylthio)-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 53°C

163. 3-methylthio-4-amino-6-(tetrahydropyran-2'-yl)-1,2,4-triazine-5-one, m.p. 180°C

164. 3-methylthio-4-dimethylamino-6-isopropyl-1,2,4-triazine-5-one, m.p. 64°C

165. 3-benzylthio-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 153°C

166. 3-methylthio-4-dimethylamino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 98°C

167. 3-methylthio-4-amino-6-(furfur-2'-yl)-1,2,4-triazine-5-one, m.p. 124°C

EXAMPLE 19

Modification of 3-methylthio-1,2,4-triazine-5-ones:

In analogous manner to the procedure of Example 9, the following compounds are also obtained:

168. 3-morpholino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 139°C

169. 3-n-butylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 125°C

170. 3-benzylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 144°C

171. 3-anilino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 162°C

172. 3-methylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 141°C

173. 3-(2'-chloro-benzylamino)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 162°C

174. 3-(3'-chloro-benzylamino)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 156°C

175. 3-methylamino-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 219°C

176. 3-ethylamino-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 178°C

177. 3-ethylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 158°C

178. 3-n-propylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 155°C

179. 3-(α-allylamino)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 147°C

180. 3-dimethylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 52°C

181. 3-n-dodecylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 104°C

182. 3-n-butylamino-4-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 173°C

183. 3-(4'-chloro-anilino)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 232°C

184. 3-(3',4'-dichloro-anilino)-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 192°C

185. 3-isopropylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 173°C

186. 3-isobutylamino-4-amino-6-isopropyl-1,2,4-triazine-5-one, m.p. 73°C

(187) 3-dimethylamino-4-amino-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 86°C

188. 3-dimethylamino-4 -amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 129° C

189. 3-methylamino-4-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 141°C

EXAMPLE 20

Preparation of 3,4-diamino-1,2,4-triazine-5-one:

In analogous manner to the procedure of Example 10, the following compound is also obtained:

190. 3,4-diamino-6-tert.-butyl-1,2,4 -triazine-5-one, m.p. 232°C (decomp.)

EXAMPLE 21

Modification of 3-methylthio-4-amino-1,2,4-triazine-5-ones at the 4-position amino group:

In analogous manner to the procedure of Example 12, the following compounds are also obtained:

191. 3-methylthio-4-(β-trichloro-α-hydroxy-ethyl)-amino- 6-isopropyl-1,2,4-triazine-5-one, m.p. 123°C

192. 3-methylthio-4-(β-trichloro-α-hydroxy-ethyl)-amino- 6-tert.-butyl-1,2,4-triazine-5-one, m.p. 166°C

193. 3-methylthio-4-(β-trichloro-α-hydroxy-ethyl)-amino-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 157°C.

EXAMPLE 22

Modification of 3-methylthio-4-amino-1,2,4-triazine-5-ones by -ylidene substitution at the 4-position amino group:

In analogous manner to the procedure of Example 12A, the following compounds are also obtained:

194. 3-methylthio-4-(prop-2'-ylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 50°C

195. 3-methylthio-4-(3'-methyl-but-2'-ylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 84°C

196. 3-methylthio-4-(3',3'-dimethyl-but-2'-ylidene-amino)-6-phenyl-1,2,4-triazine-5-one, m.p. 102°C

197. 3-methylthio-4-(hexahydrobenzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 63°C

198. 3-methylthio-4-(benzylidene-amino)-6-isopropyl-1,2,4-trizaine-5-one, m.p. 150°C

199. 3-methylthio-4-(2'-chloro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 196°C

200. 3-methylthio-4-(3'-chlorobenzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 139°C

201. 3-methylthio-4-(4'-chloro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 140°C

202. 3-methylthio-4-(2',6'-dichloro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 177°C

203. 3-methylthio-4-(furfur-2'-ylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 143°C

204. 3-methylthio-4-(cyclohexylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 86°C

205. 3-methylthio-4-(1'-phenyleth-1'-ylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 116°C

206. 3-methylthio-4-(2'-methyl-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 137°C

207. 3-methylthio-4-(4'-methoxy-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 105°C

208. 3-methylthio-4-(2',4'-dichloro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 124°C

209. 3-methylthio-4-(3'-nitro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 187°C

210. 3-methylthio-4-(4'-nitro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 116°C

211. 3-methylthio-4-(2'-chloro-5'-nitro-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 241°C

212. 3-methylthio-4-(cinnamylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 139°C

213. 3-methylthio-4-(4'-methyl-benzylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 100°C

214. 3-methylthio-4-(isobutylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 55°C

215. 3-methylthio-4-(isobutylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 156°C

216. 3-methylthio-4-(n-propylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 82°C

217. 3-methylthio-4-(n-butylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 37°C

218. 3-methylthio-4-(3'-phenyl-prop-1'ylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 111°C

219. 3-methylthio-4-(2'-ethyl-hex-1'-ylidene-amino)-6-isopropyl-1,2,4-triazine-5-one (oil)

220. 3-methylthio-4-(prop-2'-ylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 129°C

221. 3-methylthio-4-(cyclohexylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 121°C

222. 3-methylthio-4-(furfur-2'-ylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 162°C

223. 3-methylthio-4-(cyclopentylidene-amino)-6-isopropyl-1,2,4-triazine-5-one, m.p. 78°C

224. 3-methylthio-4-(prop-2'-ylidene-amino)-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 131°C

225. 3-methylthio-4-(benzylidene-amino)-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 124°C

226. 3-methylthio-4-(furfur-2'-ylidene-amino)-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 113°C

227. 3 -methylthio-4-(cyclohexylidene-amino)-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 94°C

228. 3-methylthio-4-(hexahydrobenzylidene-amino)-6-cyclohexyl-1,2,4-triazine-5-one, m.p. 62°C

229. 3-methylthio-4-(isobutylidene-amino)-6-cyclohexyl-1,2,4-triazine-5-one (viscous oil)

EXAMPLE 23

Modification of 3-methylthio-4-amino-1,2,4-triazine-5-ones by -ylidene substitution at the 4-position amino group (analogous to Examples 12A and 22):

19.7g of 3-methylamino-4-amino-6-tert.-butyl-1,2,4-triazine-5-one (175) are reacted in 100 ml of isopropanol with 10.6g of benzaldehyde and 10 ml of concentrated hydrochloric acid. Stirring is effected for several hours at 30°C, until the resulting precipitation of the corresponding hydrochloride salt ceases. The hydrochloride salt is separated by suction filtration, dissolved in 50 ml of ethanol, and the ethanol solution rendered alkaline by the addition of 10 ml of concentrated aqueous ammonia whereby the following compound crystallizes out:

230. 3-methylamino-4-(benzylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 146°C

In analogous manner, the following compounds are also obtained:

231. 3-methylamino-4-(furfur-2'-ylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 142°C

232. 3-methylamino-4-(prop-2'-ylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 189°C

233. 3-methylamino-4-(4'-chloro-benzylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one, m.p. 147°C

EXAMPLE 24

Modification of 3-hydroxy-1,2,4-triazine-5-one:

In analogous manner to the procedure of Example 5A, the following compound is also obtained:

234. 3-methoxy-4-methylamino-6-phenyl-1,2,4-triazine-5-one.

EXAMPLE 25

The procedure of Example 1 is repeated, and the particular active compounds tested, the amounts applied, and the results obtained can be seen from the following Table 1D:

                                      TABLE 1D                                     __________________________________________________________________________     Pre-emergence test                                                                                           Active compound                                                                used in Kg/             Cheno-                                                                             Echioo-              Active compound               hectare  Oats                                                                              Wheat                                                                              Cotton                                                                             Sinapis                                                                            podium                                                                             chloa                __________________________________________________________________________     (1a) O                                                                              ∥                                                                     C                        5        5  5   3   5   5   5                         ∠                                                                        CN--NH.sub.2             2.5      5  5   1   5   5   5                         ∥|                                                           NC--S--CH.sub.3          1.25     3  2   0   5   5   4-5                       ∠                                                                        N                                                                         (29a)                                                                               O                        5        1  2   0   4   3   1                         ∥                                                                     C                        2.5      1  0   0   3   2   0                         ∠                                                                        CH.sub.3 --CN--NH.sub.2                                                        ∥|     1.25     0  0   0   1   1   0                         NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (22) O                        5        5  4-5 5   5   5   5                         ∥                                                                     C                        2.5      5  4   4   5   5   5                         ∠                                                                        C.sub.2 H.sub.5 --CN--NH.sub.2                                                                          1.25     4  3   3   5   5   5                         ∥|                                                           NC--SCH.sub.3                                                                  ∠                                                                        N                                                                         *(21)                                                                               O                                                                              ∥                                                                     CH.sub.3 C               5        5  5   5   5   5   5                         |∠                                                              HC--CN--NH.sub.2         2.5      5  5   5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 1.25     5  5   5   5   5   5                         ∠                                                                        N                                                                         *(147)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              CH.sub.3 --C----CN--NH.sub.2                                                                            1.25     5  5   5   5   5   5                         |||                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(11)                                                                               O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC--CH.sub.2 --CN--NH.sub.2                                                                             1.25     5  5   5   5   5   5                         | ∥|                                                CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(23)                                                                               O                                                                              ∥               5        5  5   5   5   5   5                         CH.sub.3 C                                                                     |∠        2.5      5  5   5   5   5   5                         HC--CH.sub.2 --CH.sub.2 --CN--NH.sub.2                                         |∥|                                                                          1.25     5  5   5   5   5   5                         CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (148)                                                                               O                        5        4-5                                                                               4   4-5 5   5   5                         ∥                                                                     CH.sub.3 C               2.5      4-5                                                                               4   4-5 5   5   5                         |∠                                                              HC----CN--NH.sub.2       1.25     4-5                                                                               3-4 4   5   5   5                         |∥|                                                 CH.sub.3 NC--S--C.sub.2 H.sub.5                                                ∠                                                                        N                                                                         (153)                                                                               O                        5        5  4   5   5   5   5                         ∥                                                                     C                        2.5      4-5                                                                               4   5   5   5   5                         ∠                                                                        n-C.sub.3 H.sub.7 --CN--NH.sub.2                                                                        1.25     4-5                                                                               3   4-5 5   5   5                         ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         *(158)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--NH.sub.2       1.25     5  4   4   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.2 --C.tbd.CH                                            ∠                                                                        N                                                                         *(163)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     C                        2.5      5  5   5   5   5   5                         ∠                                                                        CN--NH.sub.2             1.25     5  5   5   5   5   5                         ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         *(214)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 CCH.sub.3       2.5      5  4-5 5   5   5   5                         |∠|                                                    HC----CN--N=CH----CH     1.25     5  4   5   5   5   5                         ||||                                       CH.sub.3 NC--S--CH.sub.3 CH.sub.3                                              ∠                                                                        N                                                                         *(197)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--N=CH           1.25     5  4-5 5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(198)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--N=CH           1.25     5  4-5 5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(206)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----C N--N= CH         1.25     5  5   4-5 5   5   5                         |∥|                                                 CHNC--S--CH.sub.3                                                              ∠                                                                        N                                                                         (213)                                                                               O                        5        5  4   4-5 5   5   5                         ∥                                                                     CH.sub.3 C               2.5      4-5                                                                               4   4-5 5   5   5                         |∠                                                              HC----CN--N=CH           1.25     4-5                                                                               3   4   5   5   4-5                       |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (207)                                                                               O                        5        4-5                                                                               4-5 4-5 5   5   5                         ∥                                                                     CH.sub.3 C               2.5      4  4   4   5   5   5                         |∠                                                              HC----CN--N=CH           1.25     4  4   4   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(201)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         51 ∠-              NC----CN--N= CH                                                                         1.25                                                                              5   4-5 5   5   5 5                       |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (209)                                                                               O                                                                              ∥                                                                     CH.sub.3 C               5        4-5                                                                               4   4-5 5   5   5                         |∠                                                              HC----CN--N=CH           2.5      4-5                                                                               4   4-5 5   4-5 5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 1.25     4  3   4-5 4   4-5 4                         ∠                                                                        N                                                                         (210)                                                                               O                                                                              ∥                                                                     CH.sub.3 C               5        4-5                                                                               4   4-5 5   5   5                         |∠                                                              HC----CM--N=CH           2.5      4-5                                                                               4   4-5 5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 1.25     3  3   3   5   4   4                         ∠                                                                        N                                                                         *(203)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--N=CH           1.25     5  4   4-5 5   5   5                         | ∥|                                                CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(215)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 CCH.sub.3       2.5      5  5   5   5   5   5                         |∠|                                                    CH--C----CN--N=CH--CH    1.25     5  5   5   5   5   5                         |∥||                                       CH.sub.3 NC--S--CH.sub.3 CH.sub.3                                              ∠                                                                        N                                                                         *(194)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠CH.sub.3                                                      HC----CN--N=C∠     1.25     5  4-5 4-5 5   5   5                         |∥|CH.sub.3                                         CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(204)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3                 2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--N              1.25     5  4-5 5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(191)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 CH              2.5      5  5   5   5   5   5                         |∠                                                              HC----CN----------N∠                                                                              1.25     5  4   5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 CH--CCl.sub.3                                         ∠ |                                                             NOH                                                                       (192)                                                                               O                        5        5  4   5   5   5   5                         ∥                                                                     CH.sub.3 CN              2.5      4-5                                                                               4   4-5 5   5   5                         |∠                                                              CH.sub.3 --C----CN----------∠                                                                     1.25     4-5                                                                               4   4-5 5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 CH--CCl.sub.3                                         ∠|                                                              NOH                                                                       *(216)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--N=CH--C.sub.2 H.sub.3                                                                         1.25     5  4-5 5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH 3                                                           ∠                                                                        N                                                                         *(217)                                                                              O                                                                              ∥                                                                     CH.sub.3 C               5        5  5   5   5   5   5                         |∠                                                              HC----CN--N=CH--C.sub.3 H.sub.7 --n                                                                     2.5      5  5   5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 1.25     5  4-5 5   5   5   5                         ∠                                                                        N                                                                         *(218)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN--N--CHCH.sub.2 CH.sub.2                                                                        1.25     5  4   5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(220)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 CCH.sub.3       2.5      5  5   5   5   5   5                         |∠                                                              CH.sub.3 --C----CN----------N--C∠                                                                 1.25     5  4-5 5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH 3CH.sub.3                                                   ∠                                                                        N                                                                         *(221)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CHC                      2.5      5  5   5   5   5   5                         |∠                                                              CH.sub.3 --C----N--N     1.25     5  4-5 5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (222)                                                                               O                        5        5  4-5 5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  4   5   5   5   5                         |∠                                                              CH--C----CN--N=CH        1.25     4-5                                                                               4   4-5 4-5 5   5                         S,51 |∥|                                            CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (223)                                                                               O                        5        5  4-5 4-5 5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  4-5 4-5 5   5   5                         |∠                                                              HC----CN--N              1.25     4-5                                                                               4   4   4-5 5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(224)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CCH.sub.3                2.5      5  5   5   5   5   5                         ∠                                                                        CN----------N=C∠   1.25     5  4-5 5   5   5   5                         ∥|                                                           NC--S--CH.sub.3 CH.sub.3                                                       ∠                                                                        N                                                                         (225)                                                                               0                        5        5  4   5   5   5   5                         ∥                                                                     C                        2.5      4  3   4-5 4   5   5                         ∠                                                                        CN----------N=CH--       1.25     4  3   4   4   4   4-5                       ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (226)                                                                               O                        5        4-5                                                                               4   3-4 4   5   5                         ∥                                                                     C                        2.5      4  3   2   4   5   4-5                       ∠                                                                        CN----------N=CH         1.25     3  2   2   4   4   4                         ∥|                                                           NC--S--CH.sub. 3                                                               ∠                                                                        N                                                                         (227)                                                                               O                        5        5  4-5 5   5   5   5                         ∥                                                                     C                        2.5      5  4-5 5   5   5   5                         ∠                                                                        CN----------N            1.25     4  4   3   4-5 4   4-5                       ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (193)                                                                               O                        5        5  4-5 5   5   5   5                         ∥                                                                     CH                       2.5      4-5                                                                               4   5   5   4-5 5                         ∠|                                                              CN--N----------CH--CCl.sub.3                                                                            1.25     4  3   5   5   4   5                         ∥||                                                 NC--S--CH.sub.3 OH                                                             ∠                                                                        N                                                                         (228)                                                                               O                        5        4-5                                                                               4-5 5   5   5   5                         ∥                                                                     C                        2.5      3  4   3   5   5   5                         ∠                                                                        CN----------N=CH         1.25     2  3   2   4   5   5                         ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (229)                                                                               O                        5        5  4-5 4-5 5   5   5                         ∥                                                                     CCH.sub.3                2.5      4-5                                                                               4   4   4   5   5                         ∠                                                                        CN--N=CH--CH ∠     1.25     4  4   4   4   4   4-5                       ∥|                                                           NC--S--CH.sub.3 .sub.3                                                         ∠                                                                        N                                                                         (100a)                                                                              O                        40       2  2   3   2   5   2                         ∥                                                                     C                                                                              ∠                                                                        CH----------NH.sub.2                                                           ∥|CH                                                         NC--N∠                                                                   ∠C.sub.4 H.sub.9 --n                                                     N                                                                         (102a)                                                                              O                        40       1  0   4   3   2   2                         ∥                                                                     C                                                                              ∠                                                                        CN----------NH.sub.2                                                           ∥|H                                                          NC--N∠                                                                   ∠CH.sub.2                                                                N                                                                         *(172)                                                                              O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 2.5             5        5  5   5   5   5                             |∠                                                              HC----CN----------NH.sub.2                                                                              1.25     5  5   5   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         **(175)                                                                             O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              CH.sub.3 --C----CN----------NH.sub.2                                                                    1.25     5  4   3   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         **(176)                                                                             O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              CH.sub.3 --C----CN----------NH.sub.2                                                                    1.25     5  4   4   5   5   5                          |∥|H                                               CH.sub.3 NC--N∠                                                          ∠C.sub.2 H.sub.5                                                         N                                                                         (177)                                                                               O                        5        5  5   5   4-5 5   5                         ∥                                                                     CH.sub.3 C               2.5      4-5                                                                               5   5   4   5   5                         |∠                                                              HC----CN----------NH.sub.2                                                                              1.25     4  2   4   3   5   4                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠C.sub.2 H.sub.5                                                         N                                                                         (178)                                                                               O                        5        3  2-3 2   4   3   3                         ∥                                                                     CH.sub.3 C               2.5      3  1   2   3   3   2                         |∠                                                              HC----CN----------NH.sub.2                                                                              1.25     2  1   1   2   2   2                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠C.sub.3 H.sub.7 --n                                                     N                                                                         (179)                                                                               O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN----------NH.sub.2                                                                              1.25     5  4   4   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠ CH.sub.2 --CH--CH.sub.2                                                N                                                                         **(180)                                                                             O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C               2.5      5  5   5   5   5   5                         |∠                                                              HC----CN----------NH.sub.2                                                                              1.25     5  5   5   5   5   5                         |∥|CH.sub.3                                         CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         (182)                                                                               O                        40       4-5                                                                               4-5 5   5   5   5                         ∥                                                                     C                                                                              ∠                                                                        CN----------NH.sub.2                                                           ∥|H                                                          NC--N∠                                                                   ∠C.sub.4 H.sub.9 -- n                                                    N                                                                         **(232)                                                                             O                        5        5  5   5   5   5   5                         ∥                                                                     CH.sub.3 CCH.sub.3       2.5      5  5   5   5   5   5                         |∠                                                              CH.sub.3 --C----CH----------N--C∠                                                                 1.25     4-5                                                                               4   5   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠CH.sub.3                                                  ∠CH.sub.3                                                                N                                                                         (230)                                                                               O                        5        4-5                                                                               4-5 4-5 5   5   4-5                       ∥                                                                     CH.sub.3 C               2.5      3  3   2   4-5 4-5 4-5                       |∠                                                              CH.sub.3 --C----CN----------N=CH                                                                        1.25     3  1   1   2   4   4                         |∥|H                                                CH.sub.3 N--N∠                                                           ∠CH.sub.3                                                                N                                                                         (233)                                                                               O                        5        4  3   3   5   5   4-5                       ∥                                                                     CH.sub.3 C               2.5      3  1   2   4   4   4                         |∠                                                              CH.sub.3 --C----CN----------N=CH                                                                        1.25     2  0   1   3   3   2                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         (231)                                                                               O                        40       5  5   5   5   5   5                         ∥                                                                     CH.sub.3 C                                                                     |∠                                                              CH.sub.3 --C----CN----------N=CH                                               |∥|H                                                CH.sub.3 NC--∠                                                           ∠CH.sub.3                                                                N                                                                         (9)  O                        5        5  5   5   5   5   5                         ∥                                                                     C                        2.5      5  5   5   5   5   5                         ∠                                                                        CN----------NH.sub.2     1.25     5  3   3   5   5   5                         ∥|H                                                          NC--N∠                                                                   ∠CH.sub.3                                                                N                                                                         (16) 0                        5        5  4-5 5   5   5   5                         ∥                                                                     C                        2.5      5  4-5 4-5 5   5   5                         ∠                                                                        CN----------NH.sub.2     1.25     5  4-5 3   5   5   4-5                       ||CH.sub.3                                                   NC--N∠                                                                   ∠CH.sub.3                                                                N                                                                         (7)  O                        5        5  5   4   5   5   5                         ∥                                                                     C                        2.5      4-5                                                                               5   3   5   5   5                         ∠                                                                        CN----------NH.sub.2     1.25     4  4   1   5   5   4                         ∥|H                                                          NC--N∠                                                                   ∠C.sub.2 H.sub.5                                                         N                                                                         (26) O                        5        5  4   3   5   5   4-5                       ∥                                                                     C                        2.5      4  3   3   4   3   2                         ∠                                                                        CN----------NH.sub.2     1.25     3  2   3   3   2   1                         ∥|H                                                          NC--N∠                                                                   ∠CH.sub.2 CH=CH.sub. 2                                                   N                                                                         (25) O                        5        1  2   2   4   3   2                         ∥                                                                     CNH.sub.2                2.5      0  1   1   2   2   1                         ∠|NH.sub.2                                                                               1.25     0  0   0   1   1   1                         CN                                                                             ∥|CH.sub.2 --CH.sub.2                                        NC--N∠∠CH.sub.2                                                    ∠CH.sub.2 --CH.sub.2                                                     N                                                                         (234)                                                                               O                        5        4-5                                                                               4   3   5   5   5                         ∥                                                                     C                        2.5      4  3   2   5   5   3                         ∠                                                                        CN--NH--CH.sub.3                                                               ∥|     1.25     3  2   1   5   5   1                         NC--O--CH.sub.3                                                                ∠                                                                        N                                                                         __________________________________________________________________________      Notes:                                                                         *denotes higher activity than close known compounds 1a and 29a for typica      new compounds of invention:                                                    **denotes higher activity than close known compounds 100a and 102a for         typical new compounds of invention.                                      

EXAMPLE 26

The procedure of Example 2 is repeated, and the particular active compounds tested, and amounts applied, and the results obtained can be seen from the following Table 2E:

                                      TABLE 2E                                     __________________________________________________________________________     Post-emergence test                                                                                       Active                                                                         compound                                                                       used in      Cot-                                                                              Sin-                                                                              Cheno-                                                                             Stella-                                                                            Galin-                                                                             Echino-              Active compound            Kg/hectare                                                                           Oats                                                                              Wheat                                                                              ton                                                                               apis                                                                              podium                                                                             ria soga                                                                               chloa                __________________________________________________________________________     (1a) O                                                                              ∥                                                                     C                     2.4   4-5                                                                               2   5  5  5   5   5   5                         ∠                                                                        CN--NH.sub.2          1.2   4-5                                                                               1   5  5  5   5   5   5                         ∥|                                                           NC--S--CH.sub.3       0.6   1  0   5  5  5   5   5   5                         ∠                                                                        N                                                                         (29a)                                                                               O                     2.4   5  3   5  5  5   5   5   5                         ∥                                                                      C                    1.2   4  2   5  5  5   5   5   5                         ∠                                                                        CH.sub.3 --CN--NH.sub.2                                                                              0.6   3  0   5  5  5   3   4   4                         ∥|                                                           NC--S--CH.sub. 3                                                               ∠                                                                        N                                                                         (22) O                     2.4   4-5                                                                               3   5  5  5   5   5   5                         ∥                                                                     C                     1.2   4-5                                                                               3   5  5  5   5   5   5                         ∠                                                                        C.sub.2 H.sub.3 --C N--NH.sub.2                                                                      0.6   4  2   5  5  5   4   5   5                         ∥|                                                           NC--SCH.sub.3                                                                  ∠                                                                        N                                                                         *(21)                                                                               O                                                                              ∥            2.4   5  5   5  5  5   5   5   5                         CH.sub.3 C                                                                     |∠                                                              HC--CN--NH.sub.2      1.2   5  5   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   5  5   5  5  5   5   5   5                         ∠                                                                        N                                                                         *(147)                                                                              O                     2.4   5  5   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   5  5   5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN--NH.sub.2                                                                         0.6   5  5   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC-- S--CH.sub.3                                                       ∠                                                                       N                                                                         *(11)                                                                               O                     2.4   5  4-5 5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   5  4   5  5  5   5   5   5                         |∠                                                              HC--CH.sub.2 --CN--NH.sub.2                                                                          0.6   5  4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(23)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   5  4-5 5  5  5   5   5   5                         |∠                                                              HC--CH.sub.2 --CH.sub.2 --CN--NH.sub.2                                                               1.2   5  4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   5  4   5  5  5   5   5   5                         ∠                                                                        N                                                                         (148)                                                                               O                     2.4   3  4-5 5  5  5   4-5 5   5                         ∥                                                                     CH.sub.3 C            1.2   3  3   5  5  5   4   3   4-5                       |∠                                                              HC----CN--NH.sub.2    0.6   2  2   3  5  5   2   2   4-5                       |∥|                                                 CH.sub.3 NC--S--C.sub.2 H.sub.3                                                ∠                                                                        N                                                                         (153)                                                                               O                     2.4   4-5                                                                               4   5  5  5   5   5   5                         ∥                                                                     C                     1.2   4  4   5  5  5   5   5   5                         ∠                                                                        n-C.sub. 3 H.sub.7 --CN--NH.sub.2                                                                    0.6   3  3   5  5  5   5   5   5                         ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (158)                                                                               O                                                                              ∥            2.4   5  4   5  5  5   5   5   5                         CH.sub.3 C                                                                     |∠     1.2   5  4   5  5  5   4-5 5   5                         HC----CN--NH.sub.2                                                             |∥|                                                                       0.6   4  4   4  5  5   3   5   5                         CH.sub.3 NC--S--CH.sub. 2 --C.tbd.CH                                           N                                                                              N                                                                         (163)                                                                               O                                                                              ∥            2.4   5  5   5  5  5   5   5   4-5                       C                     1.2   4  4-5 5  5  5   5   4   3                         ∠                                                                        CN--NH.sub.2          0.6   4  3-4 4  5  4-5 5   2   3                         ∥ |                                                          NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         *(214)                                                                              O                     2.4   5  5   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 CCH.sub.3    1.2   5  5   4-5                                                                               5  5   5   5   5                         |∠                                                              HC----CN--N=CH--CH∠                                                                            0.6   4-5                                                                               4   4-5                                                                               5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 CH.sub.3                                              ∠                                                                        N                                                                         (197)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   5  5   5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH        1.2   4  4-5 5  5  5   5   5   4-5                       |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   3  4   5  5  5   2   5   4                         ∠                                                                        N                                                                         (198)                                                                               O                     2.4   4-5                                                                               4   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   4  3   5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH        0.6   3-4                                                                               1   5  5  5   4-5 5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub. 3                                                      ∠                                                                        N                                                                         (206)                                                                               O                     2.4   4-5                                                                               4   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   4  3-4 5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH        0.6   3  2   5  5  5   4-5 4   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (213)                                                                               O                                                                              ∥                                                                     CH.sub.3              2.4   4-5                                                                               5   5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH        1.2   3-4                                                                               3-4 5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   3  2-3 5  5  5   4-5 5   4-5                       ∠                                                                        N                                                                         (207)                                                                               O                     2.4   4-5                                                                               3-4 5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C                                                                     |∠     1.2   4  3-4 5  5  5   5   5   5                         HC----CN--N=CH        0.6   3  3   4-5                                                                               5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (201)                                                                               O                     2.4   3  4   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   2  4   5  5  5   4-5 5   4-5                       |∠                                                              HC----CN--N=CH        0.6   1  4   3  5  5   3   5   4                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (209)                                                                               O                                                                              ∥                                                                     CH.sub.3 C                                                                     |∠                                                              HC----CN--N=CH        2.4   4-5                                                                               4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             1.2   4  3   5  5  5   5   5   5                         ∠                                                                        N                     0.6   4  3   5  5  5   5   4   5                    (210)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   4  4   5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH        1.2   4  4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   3  3   5  5  5   5   5   5                         ∠                                                                        N                                                                         (203)                                                                               O                     2.4   5  5   5  5  5   4-5 5   5                         ∥                                                                     CH.sub.3 C            1.2   5  4-5 5  5  5   4   5   5                         |∠                                                              HC----CN--N=CH        0.6   3  1   4  5  5   4   3   4                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(215)                                                                              O                                                                              ∥                                                                     CH.sub.3 CCH.sub.3    2.4   5  5   5  5  5   5   5   5                         |∠|                                                    CH.sub.3 -- C----CN--N=CH--CH                                                                        1.2   5  4-5 5  5  5   5   5                             |∥||                                       CH.sub.3 NC--S--CH.sub.3 CH.sub.3                                                                    0.6   4  4   5  5  5   5   5   5                         ∠                                                                        N                                                                         (194)                                                                               O                                                                              ∥                                                                     CH.sub.3 CCH.sub.3    2.4   5  4-5 5  5  5   5   5   5                         |∠                                                              HC----CN--N=C∠  1.2   4  4-5 5  5  5   5   5   5                         |∥|                                                                       0.6   2  2   4-5                                                                               5  5   5   5   2                         CH.sub.3 NC--S--CH.sub.3 CH.sub.3                                              ∠                                                                        N                                                                         (204)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   3  5   5  5  5   5   5   4                         |∠                                                              HC----CN--N           1.2   2  3   5  5  5   5   5   3                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   2  3   5  5  5   4-5 5   2                         ∠                                                                        N                                                                         (191)                                                                               O                                                                              ∥                                                                     CH.sub.3 CH           2.4   3  3   2  5  4   3   3   5                         |∠                                                              HC----CN-------- --N∠                                                                          1.2   3  3   1  4-5                                                                               3   2   2   4                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 CH--CCl.sub.3                                                               0.6   2  1   1  4  2   1   1   3                         ∠|                                                              NOH                                                                       (192)                                                                               O                     2.4   4-5                                                                               4   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 CH           1.2   4  4   5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN--------N∠                                                                   0.6   3  4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 CH--CCl.sub.3                                         ∠|                                                              NOH                                                                       *(216)                                                                              O                     2.4   5  5   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   5  5   5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH--C.sub.2 H.sub.5                                                                      0.6   5  4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(217)                                                                              O                                                                              ∥                                                                     CH.sub.3 C            2.4   5  5   5  5  5   5   5   5                         |∠                                                              HC----CN--N=CH--C.sub.3 H.sub.7 --n                                                                  1.2   5  5   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   4  4   5  5  5   5   5   5                         ∠                                                                        N                                                                         *(218)                                                                              O                                                                              ∥            2.4   5  5   5  5  5   5   5   5                         CH.sub.3 C                                                                     |∠     1.2   5  5   5  5  5   5   5   5                         HC----CN--N=CHCH.sub.2 CH.sub.2                                                |∥|                                                                       0.6   4  4   5  5  5   5   5   5                         CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         *(220)                                                                              O                                                                              ∥                                                                     CH.sub.3 CCH.sub.3    2.4   5  5   5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN----------N=C∠                                                               1.2   5  5   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3 CH.sub.3                                                                    0.6   3  4   5  5  5   5   5   5                         ∠                                                                        N                                                                         (221)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   5  4-5 5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN-- H                                                                               1.2   3  4   5  5  5   5   5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                                             0.6   3  4   5  5  5   3   3   5                         ∠                                                                        N                                                                         (222)                                                                               O                     2.4   5  4-5 5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   4  4   5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN--N=CH                                                                             0.6   3  4   5  5  5   4-5 5   5                         |∥|                                                 CH.sub.3 NC--S--CH.sub.3                                                       ∠                                                                        N                                                                         (223)                                                                               O                     2.4   3  4   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   2  4   4-5                                                                               4  4-5 2   1   4-5                       |∠                                                              HC----CN--N           0.6   1  3   3  3  4   1   1   4                         |∥|                                                 CH.sub.3 NC-- S--CH.sub.3                                                      ∠                                                                        N                                                                         (224)                                                                               O                                                                              ∥                                                                     CCH.sub.3             2.4   5  4-5 5  5  5   5   5   5                         ∠                                                                        CN----------N=C∠                                                                               1.2   4-5                                                                               4-5 5  5  5   5   3   5                         ∥|                                                           NC--S--CH.sub.3 CH.sub.3                                                                             0.6   4  4   5  5  4   4   2   5                         ∠                                                                        N                                                                         (225)                                                                               O                     2.4   4-5                                                                               5   5  5  5   5   4   5                         ∥                                                                     C                     1.2   3  4   4  5  5   5   3   5                         ∠                                                                        CN----N=CH--          0.6   2  3-4 3  5  4   2   2   4-5                       ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (226)                                                                                O                    2.4   4-5                                                                               5   4-5                                                                               5  5   5   3   5                         ∥                                                                     C                     1.2   4  4   3  5  5   5   2   5                         ∠                                                                        CN----N=CH--          0.6   3  3   3  5  5   4   1   5                         ∥|                                                           NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         (227)                                                                               O                                                                              ∥                                                                     C                     2.4   4  4-5 3  5  4-5 4-5 1   5                         ∠                                                                        CN----------N         1.2   3  4   3  5  4   3   1   5                         ∥|                                                           NC--S--CH.sub.3       0.6   2  3   3  5  2   1   1   3                         ∠                                                                        N                                                                         (193)                                                                               O                     2.4   5  4-5 5  5  5   5   5   5                         ∥                                                                     CH                    1.2   4-5                                                                               4   5  5  5   5   5   5                         ∠|                                                              CN--N--------CH--CCl.sub.3                                                                           0.6   4  3   5  5  5   5   3   4                         ∥||                                                 NC--S--CH.sub.3 OH                                                             ∠                                                                        N                                                                         (228)                                                                               O                     2.4   5  5   5  5  5   5   5   5                         ∥                                                                     C                                                                              ∠               1.2   4-5                                                                               4-5 5  5  5   4   4   5                         CN------N=CH                                                                   ∥|  0.6   3  4-5 3  5  5   4   2   4-5                       NC--S--CH.sub.3                                                                ∠                                                                        N                                                                         *(229)                                                                              O                                                                              ∥                                                                     CCH.sub.3                                                                      ∠               2.4   5  5   5  5  5   5   5   5                         CN--N=CH--CH∠                                                            ∥|  1.2   5  5   5  5  5   5   5   5                         NC--S--CH.sub.3 CH.sub.3                                                                             0.6   5  5   5  5  5   5   5   5                         ∠                                                                        N                                                                         (100a)                                                                              O                                                                              ∥                                                                     C                                                                              ∠               10    2  2-3 2-3                                                                               5  3   --  --  2-3                       CN--------NH.sub.2                                                             ∥|H                                                          NC--N∠                                                                   ∠C.sub.4 H.sub. 9 --n                                                    N                                                                         (102a)                                                                              O                                                                              ∥                                                                     C                     10    1  1   2-3                                                                               4  3   --  --  1                         ∠                                                                        CN--------NH.sub.2                                                             ∥|H                                                          NC--N∠                                                                   ∠CH.sub.2                                                                N                                                                         **(172)                                                                             O                                                                              ∥                                                                     CH.sub.3 C            2.4   5  5   5  5  5   5   5   5                         |∠                                                              HC----N--------NH.sub.2                                                                              1.2   5  5   5  5  5   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠ 0.6   5  5   5  5  5   5   5   5                         ∠CH.sub.3                                                                N                                                                         (175)                                                                               O                                                                              ∥                                                                     CH.sub.3  C           2.4   5  4-5 5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN--------NH.sub.2                                                                   1.2   4-5                                                                               4   5  5  5   5   5   4-5                       |∥|H                                                                      0.6   4-5                                                                               4   5  5  5   5   5   4-5                       CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         (176)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   4  5   5  5  5   5   5   4-5                       |∠                                                              CH.sub.3 --C----CN--------NH.sub.2                                                                   1.2   4  3   4  5  5   5   5   3                         |∥|H                                                                      0.6   3  2   4  5  5   4-5 4   3                         CH.sub.3 NC--N∠                                                          ∠C.sub.2 H.sub.5                                                         N                                                                         (177)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   4-5                                                                               4-5 4  5  5   4   4-5 4                         |∠                                                              HC----CN--------NH.sub.2                                                                             1.2   3  2   3  5  5   4   4   3                         |∥|H                                                CH.sub.3 NC--N∠ 0.6   2  2   2  5  5   1   3   1                         ∠C.sub.2 H.sub.5                                                         N                                                                         (178)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   1  2   2  5  4   2   1   2                         |∠                                                              HC----CN--------NH.sub.2                                                                             1.2   1  1   1  4  3   0   0   1                         |∥|H                                                                      0.6   0  0   1  3  3   0   0   0                         CH.sub.3 NC--N∠                                                          ∠C.sub.3 H.sub.7 -n                                                      N                                                                         (179)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   4  3   4  5  5   5   5   4                         |∠                                                              HC----CN--------NH.sub.2                                                                             1.2   2  2   3  5  5   4-5 4   2                         |∥|H                                                                      0.6   2  2   2  5  4-5 2   2   2                         CH.sub.3 NC--N∠                                                          ∠CH.sub.2 --CH=CH.sub.2                                                  N                                                                         (180)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   5  5   5  5  5   5   5   5                         |∠                                                              HC----CN--------NH.sub.2                                                                             1.2   5  5   5  5  5   5   5   5                         |∥|CH.sub.3                                         CH.sub.3 NC--N∠ 0.6   5  5   5  5  5   5   5   5                         ∠CH.sub.3                                                                N                                                                         (182)                                                                               O                                                                              ∥                                                                     C                     10    4  4   3  5  5   --  --  4-5                       ∠                                                                         CN--------NH.sub.2                                                            ∥|H                                                          NC--N∠                                                                   ∠C.sub.4 H.sub.9 --n                                                     N                                                                         **(232)                                                                             O                     2.4   5  5   5  5  5   5   5   5                         ∥                                                                     CH.sub.3 CCH.sub.3    1.2   5  4-5 5  5  5   5   5   5                         |∠                                                              CH.sub.3 --C----CN--------N=C∠                                                                 0.6   5  4   5  5  5   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠CH.sub.3                                                  ∠CH.sub.3                                                                N                                                                         (230)                                                                               O                                                                              ∥                                                                     CH.sub.3 C            2.4   4-5                                                                               5   5  5  5   5   5   4-5                       |∠                                                              CH.sub.3 --C----CN------N=CH                                                                         1.2   4  4   5  5  5   5   5   4-5                       |∥|H                                                                      0.6   2  4   2  5  5   4-5 5   4                         CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         (233)                                                                               O                     2.4   4-5                                                                               5   4-5                                                                               5  5   5   5   5                         ∥                                                                     CH.sub.3 C            1.2   4-5                                                                               4-5 4  5  5   5   5   5                         |∠                                                              CH.sub. 3 --C----CN------N=CH                                                                        0.6   4  4-5 4  5  5   5   5   5                         |∥|H                                                CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         (231)                                                                               O                                                                              ∥                                                                     CH.sub.3 C                                                                     |∠     10    5  5   5  5  5   --  --  5                         CH.sub.3 --C----CN------N=CH                                                   |∥|H                                                CH.sub.3 NC--N∠                                                          ∠CH.sub.3                                                                N                                                                         **(9)                                                                               O                                                                              ∥                                                                     C                     2.4   5  5   5  5  5   5   5   5                         ∠                                                                        CN----------NH.sub.2  1.2   5  4   5  5  5   5   5   5                         ∥|H                                                          NC--N∠          0.6   4  2   5  5  5   5   5   5                         ∠CH.sub.3                                                                N                                                                         **(16)                                                                              O                                                                              ∥                                                                     C                     2.4   5  5   5  5  5   5   5   5                          ∠                                                                       CN----------NH.sub.2  1.2   5  4-5 5  5  5   5   5   5                         ∥|CH.sub.3                                                   NC--N∠          0.6   4  4   5  5  5   5   5   5                         ∠CH.sub.3                                                                N                                                                         (7)  O                                                                              ∥                                                                     C                     2.4   5  2   5  5  5   5   5   5                         ∠                                                                        CN----------NH.sub.2  1.2   3  1   5  5  5   5   5   5                         ∥|H                                                          NC--N∠          0.6   2  0   4  5  5   4   5   4                         ∠C.sub.2 H.sub.5                                                         N                                                                         (26) O                                                                              ∥                                                                     C                     2.4   5  1   4  5  5   5   5   3                         ∠                                                                        CN----------NH.sub.2  1.2   3  1   3  5  5   2   5   3                         ∥|H 0.6   2  1   1  5  4-5 1   5   3                         NC--N∠                                                                   ∠CH.sub.2 CH=CH.sub.2                                                    N                                                                         (25) O                                                                              ∥                                                                     CNH.sub.2             10    0  1   0  4-5                                                                               3-4 --  --  1                         ∠|                                                              CN                                                                             ∥|CH.sub.2 --CH.sub.2                                        NC--N∠∠CH.sub.2                                                    ∠CH.sub.2 --CH.sub.2                                                     N                                                                         (234)                                                                               O                                                                              ∥            2.4   5  2   5  5  5   5   5   5                         C                                                                              ∠                                                                        CN--NH--CH.sub.3      1.2   4  1   3  5  5   5   5   5                         ∥|                                                           NC--O--CH.sub.3       0.6   3  0   0  5  5   5   5   5                         ∠                                                                        N                                                                         __________________________________________________________________________      NOTES:                                                                         *denotes higher activity than close known compounds 1a and 29a for typica      new compounds of invention.                                                    **denotes higher activity than close known compounds 100a and 102a for         typical new compounds of invention.                                      

I -- GENERIC INVENTION

Advantageously, in accordance with the present invention, in the foregoing formulae, as the case may be:

R represents

i. straight and branched chain aliphatic hydrocarbon having 1-18, particularly 1-10 or 1-8 or 1-6 or 1-5 or 1-4 or 1-3 or 1-2, more particularly 2-18 or 3-18 or 4-18 or 5-18 or 6-18, etc., and even 2-8 or 2-6 or 2-5 or 2-4 or 2-3, carbon atoms; including methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, amyl, isoamyl, hexyl, isohexyl, heptyl, octyl, isooctyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, and the like, especially straight and branched chain alkyl having 1-18, particularly 1-10 or 1-8 or 1-6 or 1-5 or 1-4 or 1-3 or 1-2, more particularly 2-18 or 3-18 or 4-18 or 5-18 or 6-18 etc., and even 2-8 or 2-6 or 2-5 or 2-4 or 2-3, carbon atoms, preferably 1-6 carbon atoms, more especially lower alkyl, and most especially alkyl having 1-8 or 1-6 or 1-5 or 1-4, or 2-8 or 2-6 or 2-5, or even 3-5 branched, carbon atoms; further including vinyl, α-, β- and γ-allyl- i.e. propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, and thhe like, especially straight and branched chain alkenyl having 2-18 carbon atoms, preferably 2-6 carbon atoms, more especially lower alkenyl, and most especially alkenyl having 2-4 carbon atoms; and still further including acetylenyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl, octynyl, nonynyl, decynyl, undecynyl, dodecynyl, tridecynyl, tetradecynyl, pentadecynyl, hexadecynyl, heptadecynyl, octadecenyl, and the like, especially straight and branched chain alkynyl having 2-18 carbon atoms, preferably 2-6 carbon atoms, more especially lower alkynyl, and most especially alkynyl having 2-4 carbon atoms;

ii. cycloaliphatic hydrocarbon having 5-10 or 5-8 or 5-6 ring carbon atoms, including cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, cyclooctenyl, cyclopenynyl, cyclohexynyl, cyclooctynyl, and the like, especially cycloalkyl having 5-10 ring carbon atoms and tricycloalkyl having 10 ring carbon atoms, and most especially cycloalkyl having 5-8 or 5-6 ring carbon atoms and adamantyl;

iii. araliphatic hydrocarbon having 6-10 ring carbon atoms and 1-4 aliphatic carbon atoms, including phenyl- and naphthylmethyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, vinyl, allyl, butenyl, acetylenyl, propynyl, butynyl, and the like, especially mono- and di- nuclear C₆₋₁₀ aryl substituted C₁₋₄ straight and branched chain aliphatic hydrocarbon, and most especially phenyl- and naphthyl-substituted C₁₋₄ alkyl, C₂₋₄ alkenyl, and C₂₋₄ alkynyl;

iv. aryl hydrocarbon having 6-10 ring carbon atoms, including phenyl, naphthyl, and the like, especially mono- and di-nuclear C₆₋₁₀ aryl hydrocarbon;

v. heterocyclic and heterocyclic-lower alkyl (e.g. heterocyclic-C₁₋₄ or C₁₋₃ or C₁₋₂ alkyl) correspondingly having 5-6 ring members including at least one hetero linking atom, e.g. 1-3 hetero atoms, such as oxygen, nitrogen, and/or sulfur, including α- and β- furyl, di- and tetra- hydrofuryl, furfuryl, dioxanyl, pyranyl, dihydropyranyl, tetrahydropyranyl, dioxinyl, especially p- or 1,4-dioxinyl, dioxazolyl, especially 1,2,3,-dioxazolyl morpholino, thioxanyl, especially p- or 1,4-thioxanyl, pyrazolyl, pyrrolyl, pyrrolinyl, especially Δ² -pyrrolin-1-yl, pyrrolidino, piperidyl, especially piperidino, pyridyl, pyridyl-methyl, pyrazolyl, pyrazolinyl, especially Δ² -pyrazolin-1-yl, pyrazolidinyl, especially pyrazolidin-1-yl, pyridazinyl, pyrimidinyl, especially 1,2-dihydro-pyrimidinyl, pyrrodiazolyl, especially 1,2,5-pyrrodiazol-1-yl, thiophenyl (especially thienyl), thiophanyl, thiazolyl, especially o-thiazolyl, thiazolinyl, thiazolidinyl, especially o-thiazolyl, thiazolinyl, thiazolidinyl, especially o-thiazolidin-2-yl and p-thiazolidin-3-yl, thiazinyl, especially o-thiazinyl and p-thiazinyl, thiodiazinyl, especially 1,3,4,2-thiodiazinyl, thiodiazolyl, especially 1,2,3-thiodiazolyl, thiodiazolidinyl, especially 1,2,3-thiodiazolidin-2-yl, and the like, and preferably furyl, pyridyl, and thienyl; as well as

vi. all of such aliphatic, cycloaliphatic, araliphatic, aryl, heterocyclic and heterocyclic-lower alkyl set forth under (i), (ii), (iii), (iv) and (v) above which are mono, di and poly (same and mixed) substituted, e.g., mono to tetra substituted, with substituents including halo, such as chloro, bromo, iodo and fluoro; nitro, carboloweralkoxy such as carbo-(methyl to tert-butyl inclusive, and the like, as noted above) -oxy, especially carboalkoxy having 1-6, and preferably 1-5, carbon atoms, and most especially carboalkoxy having 1-4 carbon atoms in the alkoxy moiety; lower alkyl such as methyl to tert-butyl inclusive as noted above, especially C₁₋₄ alkyl; lower alkoxy such as methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, iso-butoxy, sec-butoxy, tert-butoxy, and the like, especially C₁₋₄ alkoxy; aryl lower alkylmercapto such as mono- and di-nuclear C₆₋₁₀ aryl substituted lower alkyl mercapto, especially C₆₋₁₀ aryl- C₁₋₄ alkylmercapto, and particularly phenyl- and naphthyl(methyl to tert-butyl inclusive, and the like, as noted above) mercapto; lower alkyl mercapto such as (methyl to tert-butyl inclusive, and the like, as noted above) mercapto, and especially C₁₋₄ alkyl mercapto; C₆₋₁₀ aryl mercapto such as phenyl- and naphthyl-mercapto, and the like, especially mono- and di-nuclear arylmercapto having 6-10 ring carbon atoms; C₆₋₁₀ aryloxy such as phenoxy, naphthyloxy, and the like, especially mono- and di-nuclear aryloxy having 6-10 ring carbon atoms;

R₁ and R₂ each respectively represents

vii. hydrogen;

viii. alkyl having 1-12 carbon atoms such as methyl to dodecyl inclusive, and the like, as noted above, especially lower alkyl, and most especially C₁₋₄ alkyl;

ix. alkanoxyl having 1-6 carbon atoms such as formyl, acetyl, propionyl, butyryl, pentanoyl, hexanoyl, and the like, especially C₁₋₅, preferably C₁₋₄, and even C₂₋₅ or C₂₋₄, alkyl carbonyl; as well as

x. all such alkyl and alkanoxy set forth under (viii) and (ix) above which are mono, di and poly (same and mixed) substituted, e.g. mono to tetra substituted, with substituents including cyano, hydroxy, and halo such as chloro, bromo, iodo and/or fluoro;

with the proviso that R₁ and R₂ when taken together represent

xi. alkylidene hydrocarbon having 1-12 or 1-8 or 1-6 carbon atoms including methylidene, ethylidene, n-propylidene, isopropylidene, n-butylidene, isobutylidene, sec-butylidene, pentylidene, 3-methyl-but-2-ylidene, hexylidene, 3,3-dimethyl-but-2-ylidene, 2-ethyl-hex-1-ylidene, and the like, especially lower alkylidene, and more especially C₁₋₄ alkylidene;

xii. cyclcoalkylidene hydrocarbon having 5-8 ring carbon atoms including cyclopentylidene, cyclohexylidene, cycloheptylidene, cyclooctylidene, and the like, especially cycloloweralkylidene and more especially cyclo C₅₋₆ alkylidene; as well as

xiii. all such alkylidene and cycloalkylidene set forth under (xi) and (xii) above which are mono, di and poly (same and mixed) substituted, e.g. mono to tetra substituted, with substituents such as cycloalkyl having 5-8 ring carbon atoms such as cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, and the like, especially C₅₋₆ cycloalkyl; aryl having 6-10 ring carbon atoms, including phenyl, naphthyl, and the like, especially mono- and di- nuclear C₆₋₁₀ aryl; haloaryl having 6-10 ring carbon atoms, including halo, i.e., chloro, bromo, iodo and/or fluoro, -phenyl, -naphthyl, and the like, especially mono- and di- nuclear halo C₆₋₁₀ aryl; nitroaryl having 6-10 ring carbon atoms, including nitrophenyl, nitronaphthyl, and the like, especially mono- and di-nuclear nitro C₆₋₁₀ aryl; lower alkyl aryl having 6-10 ring carbon atoms including methyl to tert-butyl inclusive, and the like, substituted -phenyl, -naphthyl, and the like, especially mono- and di-nuclear C₁₋₄ alkyl C₆₋₁₀ aryl; lower alkoxy aryl having 6-10 ring carbon atoms including methoxy to tert-butoxy inclusive, and the like, substituted -phenyl, -naphthyl, and the like, especially mono- and di- nuclear C₁₋₄ alkoxy C₆₋₁₀ aryl; halo-nitro-aryl having 6-10 ring carbon atoms, including halo, i.e., chloro, bromo, iodo and/or fluoro, -nitro-, -phenyl, -naphthyl, and the like, especially mono- and di- nuclear halo-nitro-C₆₋₁₀ aryl; aryl-loweralkenyl having 6-10 ring carbon atoms, including phenyl-, naphthyl-, and the like, substituted -vinyl, α-, β- and γ-allyl, butenyl, and the like, especially mono- and di- nuclear C₆₋₁₀ aryl-C₂₋₄ straight and branched alkenyl; and heterocyclic and nitro-substituted heterocyclic correspondingly having 5-6 ring members including at least one hetero linking atom as set forth under (v) above and particularly furyl, nitrofuryl and pyridyl; and

with the further proviso that R₁ and R₂ when taken together with the adjacent nitrogen atom represent N-containing heterocyclic having 5-6 ring members as set forth under (v) above, and particularly morpholino and piperidino;

Y represents oxygen, sulfur or ##EQU3## and

R₃ and R₄, as the case may be, each respectively represents

xiv. hydrogen;

xv. aliphatic hydrocarbon having 1-18 carbon atoms as set forth under (i) above;

xvi. cycloaliphatic hydrocarbon having 5-8 ring carbon atoms as set forth under (ii) above;

xvii. araliphatic hydrocarbon having 6-10 ring carbon atoms and 1-4 aliphatic carbon atoms as set forth under (iii) above;

xviii. aryl hydrocarbon having 6-10 ring carbon atoms as set forth under (iv) above; as well as

xix. all such aliphatic, cycloaliphatic, araliphatic, and aryl set forth under (xv), (xvi), (xvii) and (xviii) above which are mono, di and poly (same and mixed) substituted, e.g. mono to tetra substituted, with substituents such as halo, including chloro, bromo, iodo and fluoro; amino, including unsubstituted amino and lower alkyl substituted amino such as N-lower alkyl and N,N-dilower alkyl amino, especially having 1-4 carbon atoms in each corresponding alkyl moiety, and particularly methyl to tert-butyl inclusive as noted above; nitro; lower alkyl such as methyl to tert-butyl inclusive as noted above, and especially C₁₋₄ alkyl; lower alkoxy such as methoxy to tert-butoxy inclusive as noted above, and especially C₁₋₄ alkoxy; lower alkylmercapto such as methyl to tert-butyl inclusive, and the like, -mercapto, and especially C₁₋₄ alkylmercapto; aryloxy having 6-10 ring carbon atoms such as phenoxy, naphthyloxy, and the like, especially mono- and di-nuclear C₆₋₁₀ aryloxy; and haloarylmercapto having 6-10 ring carbon atoms such as chloro, bromo, iodo and fluoro, -phenyl, -naphthyl, and the like, -mercapto, especially mono- and di- nuclear halo C₆₋₁₀ arylmercapto;

with the proviso that R₃ and R₄ when taken together with the adjacent nitrogen atom represent N-containing heterocyclic having 5-6 ring members as set forth under (v) above, and particularly morpholino and piperidino; and

with the further proviso that when Y is oxygen R₃ may also be lower alkanoyl such as formyl, acetyl, propionyl, butyryl, pentanoyl, and the like, and especially alkanoyl having 1-6 or 1-5, prefereably 1-4, carbon atoms, or even 2-5 or 2-4 carbon atoms.

I (S) -- GENERIC INVENTION

When Y is S, preferably:

R is C₁₋₁₈ aliphatic, C₅₋₁₀ cycloaliphatic, C₆₋₁₀ aryl C₁₋₄ aliphatic, C₆₋₁₀ aryl, heterocyclic or heterocyclic-lower alkyl having 5-6 ring members in the corresponding heterocyclic moiety with 1-3 hetero linking atoms such as O, N and/or S, or such aliphatic, cycloaliphatic, aryl-aliphatic, aryl, heterocyclic-alkyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as halo, nitro, carbo-lower alkoxy, lower alkyl, lower alkoxy, C₆₋₁₀ aryl-lower alkylmercapto and/or C₆₋₁₀ arylmercapto;

R₁ and R₂ each individually is hydrogen, C₁₋₁₂ alkyl or C₁₋₆ alkanoyl, or such alkyl and alkanoyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as hydroxy and/or halo;

with the proviso that R₁ and R₂ when taken together represent C₁₋₁₂ alkylidene or C₅₋₈ cycloalkylidene, or such alkylidene and cycloalkylidene, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as C₅₋₈ cycloalkyl, C₆₋₁₀ aryl, C₆₋₁₀ haloaryl, lower alkyl-C₆₋₁₀ aryl, lower alkoxy-C₆₋₁₀ aryl, nitro-C₆₋₁₀ aryl, halo-nitro-C₆₋₁₀ aryl, C₆₋₁₀ aryl-lower alkenyl, heterocyclic and/or nitro-heterocyclic, with the corresponding heterocyclic moiety having 5-6 ring members with 1-3 hetero linking atoms such as O, N and/or S; and

with the further proviso that R₁ and R₂ when taken together with the adjacent N-atom form an N-containing heterocyclic moiety having 5-6 ring members; and

R₃ is hydrogen, C₁₋₁₈ aliphatic, C₅₋₈ cycloaliphatic, C₆₋₁₀ aryl-C₁₋₄ aliphatic or C₆₋₁₀ aryl, or such aliphatic, cycloaliphatic, aryl-aliphatic and aryl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as halo, amino, lower alkyl substituted amino, nitro, lower alkyl, lower alkoxy, lower alkylmercapto, C₆₋₁₀ aryloxy and/or halo C₆₋₁₀ arylmercapto. ##EQU4##

When Y is ##EQU5## preferably:

R is C₁₋₁₈ aliphatic, C₅₋₁₀ cycloaliphatic, C₆₋₁₀ aryl-C₁₋₄ aliphatic, C₆₋₁₀ aryl or heterocyclic having 5-6 ring members with 1-3 hetero linking atoms and as O,N and/or S, or such aliphatic, cycloaliphatic, aryl-aliphatic, aryl and heterocyclic, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent such as halo, nitro, carbo-lower alkoxy, lower alkoxy, lower alkylmercapto, C₆₋₁₀ arylmercapto and/or C₆₋₁₀ aryloxy;

R₁ and R₂ each individually is hydrogen;

with the proviso that R₁ and R₂ when taken together represent C₁₋₁₂ alkylidene, or such alkylidene which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as C₆₋₁₀ aryl, C₆₋₁₀ haloaryl and/or heterocyclic having 5-6 ring members with 1-3 hetero linking atoms such as O, N and/or S; and

with the further proviso that R₁ and R₂ together with the adjacent N-atom form an N-containing heterocyclic moiety having 5-6 ring members; and

R₃ and R₄ each individually is hydrogen, C₁₋₁₈ aliphatic, C₅₋₈ cycloaliphatic, C₆₋₁₀ aryl-C₁₋₄ aliphatic or C₆₋₁₀ aryl, or such aliphatic, cycloaliphatic, aryl-aliphatic, and aryl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as halo, amino, lower alkyl substituted amino, nitro, lower alkyl, lower alkoxy and/or C₆₋₁₀ aryloxy;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form an N-containing heterocyclic moiety having 5-6 ring members.

I (O) -- GENERIC INVENTION

When Y is O, preferably:

R is C₁₋₁₈ aliphatic, C₅₋₁₀ cycloaliphatic, C₆₋₁₀ aryl-C₁₋₄ aliphatic or C₆₋₁₀ aryl;

R₁ and R₂ each individually is hydrogen, C₁₋₁₂ alkyl or C₁₋₆ alkanoyl, or such alkyl and alkanoyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as cyano, hydroxy and/or halo, especially hydroxy and/or halo;

with the proviso that R₁ and R₂ when taken together represent C₁₋₁₂ alkylidene or C₅₋₈ cycloalkylidene, or such alkylidene and cycloalkylidene, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) substituents, i.e. at least one substituent, such as C₆₋₁₀ aryl; and

R₃ is lower alkanoyl, hydrogen, C₁₋₁₈ aliphatic, C₅₋₈ cycloaliphatic, C₆₋₁₀ aryl-C₁₋₄ aliphatic or C₆₋₁₀ aryl, or such aliphatic, cycloaliphatic, aryl-aliphatic and aryl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as halo, amino, lower alkyl substituted amino, nitro, lower alkyl, lower alkoxy and/or C₆₋₁₀ aryloxy.

II -- SUBGENERIC INVENTION

Y is O, S and ##EQU6## and preferably:

R is C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₅₋₁₀ cycloalkyl, phenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, naphthyl-C₁₋₄ alkyl, naphthyl-C₂₋₄ alkenyl, furyl-C₁₋₄ alkyl, pyridyl-C₁₋₄ alkyl, phenyl, naphthyl, furyl, pyranyl, pyridyl or thienyl, or such alkyl, alkenyl, alkynyl, cycloalkyl, phenyl-alkyl, phenyl-alkenyl, naphthyl-alkyl, naphthyl-alkenyl, furyl-alkyl, pyridyl-alkyl, phenyl, naphtyl, furyl, pyranyl, pyridyl and thienyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluoro, iodo, nitro, carbo-C₁₋₄ alkoxy, C₁₋₄ alkyl, C₁₋₄ alkoxy, phenyl-C₁₋₄ alkylmercapto, C₁₋₄ alkylmercapto, phenylmercapto, naphthylmercapto, phenoxy and/or naphthyloxy;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl or C₂₋₅ alkanoyl, or such alkyl and alkanoyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as cyano, hydroxy and/or halo;

with the proviso that R₁ and R₂ when taken together represent C₁₋₈ alkylidene or C₅₋₆ cycloalkylidene, or such alkylidene and cycloalkylidene, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as C₅₋₆ cycloalkyl, phenyl, naphthyl, halophenyl, halonaphthyl, C₁₋₄ alkylphenyl, C₁₋₄ alkyl naphthyl, C₁₋₄ alkoxy phenyl, C₁₋₄ alkoxy naphthyl, nitrophenyl, nitronaphthyl, chloro-nitro-phenyl, chloro-nitro-naphthyl, phenyl-C₂₋₄ alkenyl, naphthyl-C₂₋₄ alkenyl, furyl, nitro-furyl and/or pyridyl; and

R₃ and R₄ each individually is hydrogen, C₁₋₁₈ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₅₋₆ cycloalkyl, phenyl C₁₋₄ alkyl, phenyl C₂₋₄ alkenyl, naphthyl C₁₋₄ alkyl, naphthyl-C₂₋₄ alkenyl, phenyl or naphthyl, or such alkyl, alkenyl, alkynyl, cycloalkyl, phenylalkyl, phenyl-alkenyl, naphthyl-alkyl, naphthyl-alkenyl, phenyl and naphthyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluoro, iodo, amino, C₁₋₄ alkylamino, di-C₁₋₄ alkyl-amino, nitro, C₁₋₄ alkyl, C₁₋₄ alkoxy, C₁₋₄ alkylmercapto, phenyloxy, naphthyloxy, chlorophenylmercapto and/or chloro-naphthylmercapto;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form an N-containing heterocyclic moiety having 5-6 ring members such as morpholino or piperidino; and

with the further proviso that when Y is O then R₃ is also C₂₋₄ alkanoyl.

II (S) -- SUBGENERIC INVENTION

When Y is S, preferably:

R is C₁₋₆ alkyl, C₅₋₁₀ cycloalkyl, phenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, furyl-C₁₋₄ alkyl, pyridyl-C₁₋₄ alkyl, phenyl, naphthyl, furyl, pyranyl or thienyl, or such alkyl, cycloalkyl, phenyl-alkyl, phenyl alkenyl, furyl-alkyl, pyridyl-alkyl, phenyl, naphthyl, furyl, pyranyl and thienyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluoro, iodo, nitro, carbo-C₁₋₄ alkoxy, C₁₋₄ alkyl, C₁₋₄ alkoxy and/or phenyl-C₁₋₄ alkylmercapto;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl or C₂₋₅ alkanoyl, or such alkyl and alkanoyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substitutent, such as hydroxy and/or halo;

with the proviso that R₁ and R₂ when taken together represent C₁₋₈ alkylidene or C₅₋₆ cycloalkylidene, or such alkylidene and cycloalkylidene, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as C₅₋₆ cycloalkyl, phenyl, naphthyl, halophenyl, halonaphthyl, C₁₋₄ alkyl-phenyl, C₁₋₄ alkylnaphthyl, C₁₋₄ alkoxy-phenyl, C₁₋₄ alkoxy-naphthyl, nitrophenyl, nitronaphthyl, chloro-nitro-phenyl, chloro-nitro-naphthyl, phenyl-C₂₋₄ alkenyl, naphthyl-C₂₋₄ alkenyl, furyl, nitro-furyl and/or pyridyl; and

R₃ is hydrogen, C₁₋₁₈ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₅₋₆ cycloalkyl, phenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, naphthyl-C₁₋₄ alkyl, naphthyl-C₂₋₄ alkenyl, phenyl or naphthyl, or such alkyl, alkenyl, alkynyl, cycloalkyl, phenyl-alkyl, phenyl-alkenyl, naphthyl-alkyl, naphthyl-alkenyl, phenyl and naphthyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluro, iodo, amino, C₁₋₄ alkylamino, di-C₁₋₄ alkyl-amino, nitro, C₁₋₄ alkyl, C₁₋₄ alkoxy, C₁₋₄ alkylmercapto, phenoxy, naphthyloxy, chloro-phenylmercapto and/or chloro-naphthylmercapto. ##EQU7##

When Y is ##EQU8## preferably:

R is C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₅₋₁₀ cycloalkyl, phenyl-C₁₋₄ alkyl, phenyl, furyl or pyridyl, or such alkyl, alkenyl, alkynyl, cycloalkyl, phenyl-alkyl, phenyl, furyl and pyridyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluoro, iodo, nitro, carbo-C₁₋₄ alkoxy, C₁₋₄ alkoxy, C₁₋₄ alkylmercapto, phenylmercapto, naphthylmercapto, phenyloxy and/or naphthyloxy;

R₁ and R₂ each respectively is hydrogen;

with the proviso that R₁ and R₂ when taken together represent C₁₋₈ alkylidene, or such alkylidene which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as phenyl, naphthyl, halophenyl, halonaphthyl and/or furyl; and

R₃ and R₄ each respectively is hydrogen, C₁₋₁₈ alkyl, C₂₋₆ alkenyl, C₅₋₆ cycloalkyl, phenyl-C₁₋₄ alkyl or phenyl, or such alkyl, alkenyl, cycloalkyl, phenyl-alkyl and phenyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluoro, iodo, amino, C₁₋₄ alkylamino, di-C₁₋₄ alkyl-amino, nitro, C₁₋₄ alkyl, C₁₋₄ alkoxy, phenoxy and/or naphthyloxy;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form an N-containing heterocyclic moiety having 5-6 ring members such as morpholino or piperidino.

II (O) -- SUBGENERIC INVENTION l

When Y is O, preferably:

R is C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₅₋₁₀ cycloalkyl, phenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, naphthyl-C₁₋₄ alkyl, naphthyl-C₂₋₄ alkenyl, phenyl or naphthyl;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl or C₂₋₅ alkanoyl, or such alkyl and alkanoyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as cyano, hydroxy and/or halo;

with the proviso that R₁ and R₂ when taken together represent C₁₋₁₈ alkylidene or C₅₋₆ cycloalkylidene, or such alkylidene and cycloalkylidene, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) substituents, i.e. at least one substituent, such as phenyl; and

R₃ is C₂₋₄ alkanoyl, hydrogen, C₁₋₁₈ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₅₋₆ cycloalkyl, phenyl-C₁₋₄ alkyl, naphthyl-C₁₋₄ alkyl, phenyl or naphthyl, or such alkyl, alkenyl, alkynyl, cycloalkyl, phenyl-alkyl, naphthyl-alkyl, phenyl and naphthyl, respectively, which is substituted with 1-4 or 1-3 or 1-2 (or even 1) same or mixed substituents, i.e. at least one substituent, such as chloro, bromo, fluoro, iodo, amino, C₁₋₄ alkylamino, di-C₁₋₄ alkyl-amino, nitro, C₁₋₄ alkyl, C₁₋₄ alkoxy, phenoxy and/or naphthyloxy.

III -- PREFERRED EMBODIMENT

Y is O, S and ##EQU9## and preferably:

R is C₁₋₆ alkyl, cyclohexyl, adamantyl, phenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, phenyl, furyl, pyranyl, furfuryl, pyridylmethyl, C₂₋₄ carbo alkoxy-C₁₋₄ alkyl, phenyl-C₁₋₄ alkylmercapto-C₁₋₄ alkyl, chlorophenyl-C₁₋₄ alkyl, C₁₋₄ alkylphenyl, C₁₋₄ alkoxy-phenyl, chlorophenyl or nitrophenyl;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl, C₂₋₄ alkanoyl or chloro-hydroxy-C₁₋₄ alkyl;

with the proviso that R₁ and R₂ when taken together represent C₁₋₈ alkylidene, cyclopentylidene, cyclohexylidene, cyclohexyl-C₁₋₄ alkylidene, phenyl-C₁₋₄ alkylidene, styryl-C₁₋₄ alkylidene, chlorophenyl-C₁₋₄ alkylidene, C₁₋₄ alkyl-phenyl-C₁₋₄ alkylidene, C₁₋₄ alkoxy-phenyl-C₁₋₄ alkylidene, nitrophenyl-C₁₋₄ alkylidene, chloro-nitro-phenyl-C₁₋₄ alkylidene, furyl-C₁₋₄ alkylidene, nitro-furyl-C₁₋₄ alkylidene or pyridyl-C₁₋₄ alkylidine; and

R₃ and R₄ each individually is hydrogen, C₁₋₁₈ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, cyclohexyl, phenyl, phenyl-C₁₋₄ alkyl, chloro-C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl, C₁₋₄ alkylmercapto-C₁₋₄ alkyl, chlorophenyl-C₁₋₄ alkyl, chlorophenylmercapto-C₁₋₄ alkyl or chlorophenyl;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form a morpholino or piperidino group; and

with the further proviso that when Y is O then R₃ is also C₂₋₄ alkanoyl.

III (S) -- PREFERRED EMBODIMENT

When Y is S, preferably:

R is C₁₋₆ alkyl, cyclohexyl, adamantyl, phenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, phenyl, furyl, pyranyl, furfuryl, pyridylmethyl, C₂₋₄ carbo-alkoxy-C₁₋₄ alkyl, phenyl-C₁₋₄ alkylmercapto-C₁₋₄ alkyl, chlorophenyl-C₁₋₄ alkyl, C₁₋₄ alkyl-phenyl, C₁₋₄ alkoxy-phenyl, chlorophenyl or nitrophenyl;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl, C₂₋₄ alkanoyl or chloro-hydroxy-C₁₋₄ alkyl;

with the proviso that R₁ and R₂ when taken together represent C₁₋₁₈ alkylidene, cyclopentylidene, cyclohexylidene, cyclohexyl-C₁₋₄ alkylidene, phenyl-C₁₋₄ alkylidene, styryl-C₁₋₄ alkylidene, chlorophenyl-C₁₋₄ alkylidene, C₁₋₄ alkyl-phenyl-C₁₋₄ alkylidene, C₁₋₄ alkoxy-phenyl-C₁₋₄ alkylidene, nitrophenyl-C₁₋₄ alkylidene, chloro-nitro-phenyl-C₁₋₄ alkylidene, furyl-C₁₋₄ alkylidene, nitro-furyl-C₁₋₄ alkylidene or pyridyl-C₁₋₄ alkylidene; and

R₃ is hydrogen, C₁₋₁₈ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, cyclohexyl, phenyl-C₁₋₄ alkyl, chloro-C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl, C₁₋₄ alkylmercapto-C₁₋₄ alkyl, chlorophenyl-C₁₋₄ alkyl or chlorophenylmercapto-C₁₋₄ alkyl. ##EQU10##

When Y is ##EQU11## preferably:

R is C₁₋₆ alkyl, cyclohexyl, phenyl, chlorophenyl-C₁₋₄ alkyl or chlorophenyl;

R₁ and R₂ each individually is hydrogen;

with the proviso that R₁ and R₂ when taken together represent C₁₋₈ alkylidene, phenyl-C₁₋₄ alkylidene, chlorophenyl-C₁₋₄ alkylidene or furyl-C₁₋₄ alkylidene; and

R₃ and R₄ each individually is hydrogen, C₁₋₁₈ alkyl, C₂₋₄ alkenyl, phenyl, phenyl-C₁₋₄ alkyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl chlorophenyl-C₁₋₄ alkyl or chlorophenyl;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form a morpholino or piperidino group.

III (O) -- PREFERRED EMBODIMENT

When Y is O, preferably:

R is C₁₋₆ alkyl, cyclohexyl, phenyl-C₁₋₄ alkyl or phenyl;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl, C₂₋₄ alkanoyl or chloro-hydroxy-C₁₋₄ alkyl; and

R₃ is C₂₋₄ alkanoyl, hydrogen, C₁₋₈ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, chloro-C₂₋₄ alkenyl or di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl.

IV -- PARTICULAR EMBODIMENT

Y is O, S or ##EQU12## and preferably:

A. when Y is O,

R is C₁₋₅ alkyl, C₅₋₆ cycloalkyl, phenyl or phenyl-C₁₋₄ alkyl;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl, C₂₋₅ alkanoyl or hydroxy-trichloro-C₂₋₄ alkyl; and

R₃ is hydrogen, C₁₋₈ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, dichloro-C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl or C₂₋₅ alkanoyl;

B. when Y is S,

R is C₁₋₈ or C₂₋₈ alkyl, C₅₋₁₀ cycloalkyl, C₁₋₄ alkoxycarbonyl-C₁₋₄ alkyl, optionally phenyl, chlorophenyl, C₁₋₄ alkyl-phenyl, C₁₋₄ alkoxy-phenyl, nitrophenyl, phenyl-C₁₋₄ alkyl, chlorophenyl-C₁₋₄ alkyl, phenyl-C₂₋₄ alkenyl, phenyl-C₁₋₄ alkylmercapto-C₁₋₄ alkyl, furyl, furfuryl, pyranyl or pyridylmethyl;

R₁ and R₂ each individually is hydrogen, C₁₋₄ alkyl, C₂₋₅ alkanoyl or hydroxy-trichloro-C₂₋₄ alkyl;

with the proviso that R₁ and R₂ when taken together represent C₁₋₁₂ alkylidene, C₅₋₆ cycloalkylidene, C₅₋₆ cycloalkyl-C₁₋₄ alkylidene, phenyl-C₁₋₄ alkylidene, phenyl-C₂₋₆ alkenylidene, mono and di chloro-phenyl-C₁₋₄ alkylidene, C₁₋₄ alkyl-phenyl-C₁₋₄ alkylidene, C₁₋₄ alkoxy-phenyl-C₁₋₄ alkylidene nitro-phenyl-C₁₋₄ alkylidene, chloro-nitro-phenyl-C₁₋₄ alkylidene, furfurylidin nitro-furfurylidene or pyridyl-methylidene; and

R₃ is hydrogen, C₁₋₁₈ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, dichloro-C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl, C₁₋₄ alkylmercapto-C₁₋₄ alkyl, C₅₋₆ cycloalkyl, phenyl-C₁₋₄ alkyl, chlorophenyl-C₁₋₄ alkyl or chlorophenylmercapto-C₁₋₄ alkyl; and

C. When Y is ##EQU13##

R is C₁₋₅ or C₂₋₅ alkyl, C₅₋₆ cycloalkyl, optionally phenyl, chlorophenyl or chlorophenyl-C₁₋₄ alkyl;

R₁ and R₂ each individually is hydrogen;

with the proviso that R₁ and R₂ when taken together represent C₁₋₄ alkylidene, phenyl-C₁₋₄ alkylidene, chloro-phenyl-C₁₋₄ alkylidene or furfurylidene; and

R₃ and R₄ each individually is hydrogen, C₁₋₁₈ or C₁₋₄ alkyl, C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl, phenyl, mono and di chloro-phenyl, phenyl-C₁₋₄ alkyl or chlorophenyl-C₁₋₄ alkyl;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form optionally a morpholino group or a piperidino group, i.e. 3-oxa-pentamethylene or pentamethylene attached at the corresponding terminal carbon atoms to said N-atom.

V -- MORE PARTICULAR EMBODIMENT

Y is O, S or ##EQU14## and preferably;

A' when Y is O,

R is C₁₋₅ alkyl, cyclohexyl, phenyl or benzyl;

R₁ is hydrogen, C₁₋₄ alkyl, acetyl or 1-hydroxy-2,2,2-trichloro-ethyl;

R₂ is hydrogen or acetyl; and

R₃ is hydrogen, C₁₋₆ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, dichloro-C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl or acetyl;

B' when Y is S,

R is C₁₋₆ or C₂₋₆ alkyl, cyclohexyl, adamantyl, C₁₋₄ alkoxy-carbonyl-methyl, optionally phenyl, chlorophenyl, C₁₋₄ alkyl-phenyl, C₁₋₄ alkoxy-phenyl, nitrophenyl, benzyl, chlorobenzyl, styryl, benzylmercaptomethyl, furyl, furfuryl, pyranyl or pyridyl-methyl;

R₁ is hydrogen, C₁₋₄ alkyl, acetyl or 1-hydroxy-2,2,2-trichloro-ethyl;

R₂ is hydrogen, C₁₋₄ alkyl or acetyl;

with the proviso that R₁ and R₂ when taken together represent C₁₋₈ alkylidene, C₅₋₆ cycloalkylidene, hexahydrobenzylidene, phenyl-C₁₋₄ alkylidene, cinnamylidene, mono and di chloro-benzylidene, C₁₋₄ alkyl-benzylidene, C₁₋₄ alkoxy-benzylidene, nitro-benzylidene, chloro-nitro-benzylidene, furfurylidene, nitro-furfurylidene or pyridyl-methylidene; and

R₃ is hydrogen, C₁₋₁₈ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, dichloro-C₂₋₄ alkenyl, di-C₁₋₄ alkyl-amino-C₁₋₄ alkyl, C₁₋₄ alkylmercapto-C₁₋₄ alkyl, cyclohexyl, benzyl, chlorobenzyl or chlorophenylmercaptomethyl; and

C' when Y is ##EQU15##

R is C₁₋₅ or C₂₋₅ alkyl, cyclohexyl, optionally phenyl, chlorophenyl or chlorobenzyl;

R₁ and R₂ each individually is hydrogoen;

with the proviso that R₁ and R₂ when taken together represent C₁₋₄ alkylidene, benzylidene, chloro-benzylidene or furfurylidene;

R₃ is hydrogen, C₁₋₁₈ alkyl, C₂₋₄ alkenyl, di-C₁₋₄ alkylamino-C₁₋₄ alkyl, phenyl, mono and di chloro-phenyl, benzyl or chloro-benzyl; and

R₄ is hydrogen or C₁₋₄ alkyl;

with the proviso that R₃ and R₄ when taken together with the adjacent N-atom form optionally a morpholine group or a piperidino group, i.e. 3-oxa-pentamethylene or pentamethylene attached at the corresponding terminal carbon atoms to said N-atom.

VI -- SPECIAL EMBODIMENT

In accordance with a special embodiment of compounds having surprisingly higher herbicidal properties, Y is S or ##EQU16## and

R is C₂₋₅ alkyl or cyclohexyl;

R₁ is hydrogen or 1-hydroxy-2,2,2-trichloro-ethyl;

R₂ is hydrogen;

with the proviso that R₁ and R₂ when taken together represents C₃₋₄ alkylidene or cyclohexylidene;

R₃ is C₁₋₄ alkyl; and

R₄ is hydrogen or C₁₋₄ alkyl.

VII -- PREFERRED SPECIAL EMBODIMENT

In accordance with a preferred case of such special embodiment of compounds having surprisingly higher herbicidal properties, Y is S or ##EQU17## and

R is C₃₋₅ branched alkyl or cyclohexyl;

R₁ is hydrogen or 1-hydroxy-2,2,2-trichloro-ethyl;

R₂ is hydrogen;

with the proviso that R₁ and R₂ when taken together represent C₃₋₄ branched alkylidene or cyclohexylidene;

R₃ is C₁₋₂ alkyl; and

R₄ is hydrogen or methyl.

VIII -- NEW COMPOUNDS

With specific reference to the particular new compounds of the present invention, considering the foregoing definitions, especially under I -- GENERIC INVENTION:

a. when Y is O,

R, R₁, R₂ and R₃ are the same as defined under (i) through (xix) above, respectively, as the case may be, with the proviso that R₃ may also be lower alkanoyl such as formyl, acetyl, propionyl, butyryl, pentanoyl, and the like, and especially alkanoyl having 1-5 or 2-5, preferably 1-4 or 2-4, carbon atoms;

b. when Y is S, and R₁, R₂ and R₃ are the same as defined under (a) immediately above,

R is the same as defined under (a) immediately above, with the proviso that when R is aliphatic in accordance with (i) above, said aliphatic always has at least 2, or at least 3, or at least 4, or at least 5, or at least 6, or more, and up to 18 carbon atoms and preferably has 2-6, 3-6, 4-6, or 5-6 and up to 18 carbon atoms, and with the further proviso that when R is aryl in accordance with (iv) above, such aryl is always substituted aryl which is substituted in accordance with (vi) above;

c. when Y is S, and R, R₁ and R₂ are the same as defined under (a) immediately above,

R₃ is the same as defined under (xv) through (xix) above, respectively, with the proviso that when R₃ is aliphatic in accordance with (xv) above, such aliphatic always has at least 2, or at least 3, or at least 4, or at least 5, or at least 6, or more and up to 18 carbon atoms, and preferably has 2-6, 3-6, 4-6, or 5-6 and up to 18 carbon atoms;

d. when Y is S, and R and R₃ are the same as defined under (a) immediately above,

R₁ and R₂ each respectively is the same as defined under (viii), (ix) and (x) above, as the case may be, with the proviso that R₁ and R₂ when taken together represent alkylidene or cycloalkylidene as defined under (xi) through (xiii) above, with the optional preferred proviso that such alkylidene when substituted with aryl having 6-10 carbon atoms always has at least 2, or at least 3, or at least 4, or at least 5, or at least 6, or more and up to 18 carbon atoms, and preferably has 2-6, 3-6, 4-6, or 5-6 and up to 18 carbon atoms;

e. when Y is ##EQU18## and R₁, R₂ and R₃ are the same as defined under (a) immediately above,

R is the same as defined under (b) immediately above, and

R₄ is defined individually in the same way as R₃ is defined wherein R₃ and R₄ may be alike or different, with the proviso that R₃ and R₄ when taken together with the adjacent nitrogen atom represent N-containing heterocyclic as defined under (v) above;

f. when Y is ##EQU19## and R and R₃ are the same as defined under (a) immediately above,

R₁ and R₂ each respectively is the same as defined under (viii) through (xiii) above, as the case maya be, and

R₄ is the same as defined under (e) immediately above, with the proviso that R₃ and R₄ when taken together with the adjacent nitrogen atom represent N-containing heterocyclic as defined under (v) above; and

g. when Y is ##EQU20## and R, R₁ and R₂ are the same as defined under (a) immediately above;

R₃ and R₄ each respectively is the same as defined under (xv), (xvi), (xvii), (xviii) and (xix) above, as the case may be, with the proviso that R₄ may also be hydrogen and that when R₄ is hydrogen R₃ is aliphatic as defined under (i) above but having always only 1-3 carbon atoms, or cycloaliphatic as defined under (ii) above, or substituted -aliphatic having 1-18 carbon atoms, -cycloaliphatic, -araliphatic or -aryl as defined under (i), (ii), (iii), (iv) when taken together with (xix), as the case may be, and with the further proviso that R₃ and R₄ when taken together with the adjacent nitrogen atom represent heterocyclic as defined under (v) above but always excluding oxygen as hetero atom.

Similarly, analogous coverage to that defined under I-(S)-GENERIC INVENTION through VII -- PREFERRED SPECIAL EMBODIMENT is intended for the instant new compounds; i.e. all cases where, when Y is S, R is not methyl or is not phenyl, or R₁ and R₂ are both not simultaneously hydrogen, or R₃ is not methyl; or where, when Y is ##EQU21## R is not methyl or is not phenyl, or R₁ and R₂ are both not simultaneously hydrogen, or R₃ and R₄ are not simultaneously hydrogen, or when R₄ is hydrogen R₃ is at most C₁₋₃ alkyl, or not phenyl, or not benzyl, or R₃ and R₄ when taken together withethe adjacent N-atom do not form morpholino.

It will be realized that as used herein the term "ylidene-amino" is meant to be synonymous with the term "ylidene-imino" so as to cover the hydrocarbyl-amino or hydrocarbyl-imino linkages --CH=N-- and ##EQU22## as the case may be (cf. the corresponding linkages of compounds 14, 15, 17-19, 27, 28, 35, 119-124, 127 and 194-233 for ##EQU23## when R₁ and R₂ are taken together). These linkages are to be distinguished from N-containing heterocyclic linkages of certain of the instant compounds (cf. the corresponding linkages of compounds 125, 126 and 128-133 for ##EQU24## when R₁ and R₂ are taken together with the adjacent N-atom, as well as those of compounds 13a, 25, 133 and 168 for ##EQU25## when R₃ and R₄ are taken together with the adjacent N-atom).

A preferred sub-group of compounds in accordance with the invention includes those of formula (I) wherein Y is S, R is branched lower alkyl or cycloalkyl, R₃ is lower alkyl, and R₁ and R₂ are individually hydrogen or taken together are cycloalkylidene having 5-8 ring carbon atoms or alkylidene having 1-12 carbon atoms substituted with aryl having 6-10 ring carbon atoms or furyl, pyridyl, thienyl, pyrryl, chinolyl, thiazolyl, imidazolyl or indyl. Especially preferred are those wherein R is branched butyl, e.g. tert.-butyl, R₃ is methyl, and R₁ and R₂ are individually hydrogen or taken together are cyclopentylidene, cyclohexylidene or lower alkylidene substituted with phenyl, furyl, nitrophenyl, lower alkyl phenyl or lower alkoxy phenyl, e.g. cyclohexylidene, benzylidene, nitrofurfurylidene, and the like.

Thus, 3-methylthio-4-(cyclohexylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one (221) shows very good general herbicidal activity on post-emergence and for pre-emergence is selective for soybeans, i.e. it will prevent growth of most plants and weeds but not of soybeans.

The very similar cyclopentyl compound (223), m.p. 78°C., is similarly useful, as is the corresponding furfuryl-idene-2 compound (222), and can be prepared in the same manner as in Example 22.

2-methylthio-4-(benzylidene-amino)-6-tert.-butyl-1,2,4-triazine-5-one (236) has the same general properties and is also selective as to cotton and tomatoes on pre-emergence application. It is also effective in growing corn, potatoes, millet and peanuts applied to the extent of 0.3-2 kg/hectare. Surprisingly the compound also exhibits fungicidal activity, particularly against Alternaria which makes it especially useful in growing tomatoes. It also kills nematoeds on the soil when applied at 1 Kg/hectare. Its toxicity is quite low, i.e. LD₅₀ when applied orally to rats is 1000 mg/Kg. It can be prepared in analogous manner according to Example 22 and has a melting point of 137°C.

All of the foregoing compounds contemplated by the present invention possess the desired selective herbicidal properties, and especially the capability of selectively destroying weeds. It will be realized that the instant compounds possess total herbicidal action when used in large quantities, although selective herbicidal action section is obtained when used in smaller quantities. As contemplated herein, the term "weeds" is meant to include not only weeds in the narrow sense, but also in the broad sense, whereby to cover all plants and vegetation considered for the particular purposes in question.

It will be appreciated that the instant specification and examples are set forth by way of illustration and not limitation, and that various modifications and changes may be made without departing from the spirit and scope of the present invention. 

What is claimed is:
 1. Substituted 1,2,4-triazine-5-one having the formula ##EQU26## in which Y is selected from the group consisting of O and S, and (a') when Y is O,R is selected from the group consisting of alkyl having 1-6 carbon atoms, alkenyl having 2-6 carbon atoms, alkynyl having 2-6 carbon atoms, cycloalkyl having 5-6 ring carbon atoms, phenyl alkyl having 1-4 carbon atoms in the alkyl moiety, phenylalkenyl having 2-4 carbon atoms in the alkenyl moiety, naphthylalkyl having 1-4 carbon atoms in the alkyl moiety, naphthyl alkenyl having 2-4 carbon atoms in the alkenyl moiety, phenyl, naphthyl, furyl, pyridyl, and thienyl, and such alkyl, alkenyl, alkynyl, cycloalkyl, phenylalkyl, phenyalkenyl, naphthylalkyl, naphthylalkenyl, phenyl, naphthyl, furyl, pyridyl and thienyl which is substituted with a substituent selected from the group consisting of chloro, bromo, fluoro, iodo, nitro, carboalkoxy having 1-4 carbon atoms, alkyl having 1-4 carbon atoms, alkoxy having 1-4 carbon atoms, phenyl-alkylmercapto having 1-4 carbon atoms in the alkyl moiety, alkylmercapto having 1-4 carbon atoms, phenylmercapto, naphthylmercapto, phenyloxy, naphthyloxy, and mixtures of such substituents, R₁ and R₂ taken together represent a member selected from the group consisting of alkylidene having 1-4 carbon atoms and cycloalkylidene having 5-6 ring carbon atoms substituted with a substituent selected from the group consisting of furyl, nitrofuryl and pyridyl, and R₃ is selected from the group consisting of alkanoyl having 1-4 carbon atoms, hydrogen, alkyl having 1-6 carbon atoms, alkenyl having 2-6 carbon atoms, alkynyl having 2-6 carbon atoms cycloalkyl having 5-6 ring carbon atoms, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, phenylalkenyl having 2-4 carbon atoms in the alkenyl moiety, naphthylalkyl having 1-4 carbon atoms in the alkyl moiety, naphthylalkenyl having 2-4 carbon atoms in the alkenyl moiety, phenyl, naphthyl, and such alkyl, alkenyl, alkynyl, cycloalkyl, phenyl alkyl, phenyalkenyl, naphthylalkyl, naphthylalkenyl, phenyl and naphthyl which is substituted with a substituent selected from the group consisting of chloro, bromo, fluoro, iodo, amino, alkyl amino having 1-4 carbon atoms in the alkyl moiety, dialkyl amino having 1-4 carbon atoms in each alkyl moiety, nitro, alkyl having 1-4 carbon atoms, alkoxy having 1-4 carbon atoms, phenyloxy, naphthyloxy, and mixtures of such substituents; b'. when Y is S, and R₁, R₂ and R₃ are the same as defined under (a') above, R is selected from the group consisting of alkyl having 2-6 carbon atoms, alkenyl having 2-6 carbon atoms, alkynyl having 2-6 carbon atoms, cycloalkyl having 5-6 ring carbon atoms, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, phenylalkenyl having 2-4 carbon atoms in the alkenyl moiety, naphthylalkyl having 1-4 carbon atoms in the alkyl moiety, naphthylalkenyl having 2-4 carbon atoms in the alkenyl moiety, furyl, pyridyl, and thienyl, and such alkyl, alkenyl, alkynyl, cycloalkyl, phenylalkyl, phenylalkenyl, naphthylalkyl, naphthylalkenyl, furyl, pyridyl, and thienyl as well as phenyl and naphthyl which is substituted with a substituent selected from the group consisting of chloro, bromo, fluoro, iodo, nitro, carboalkoxy having 1-5 carbon atoms, alkyl having 1-4 carbon atoms, alkoxy having 1-4 carbon atoms, phenyl-alkylmercapto having 1-4 carbon atoms in the alkyl moiety, alkylmercapto having 1-4 carbon atoms, phenyl mercapto, naphthylmercapto, phenyloxy, naphthyloxy, and mixtures of such substituents;c'. when Y is S, and R, R₁ and R₂ are the same as defined under (a') above, R₃ is selected from the group consisting of alkyl having 2-6 carbon atoms, alkenyl having 2-6 carbon atoms, alkynyl having 2-6 carbon atoms, cycloalkyl having 5-6 ring carbon atoms, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, phenylalkenyl having 2-4 carbon atoms in the alkenyl moiety, naphthylalkyl having 1-4 carbon atoms in the alkyl moiety, naphthylalkenyl having 2-4 carbon atoms in the alkenyl moiety, phenyl, naphthyl, and such alkyl, alkenyl, alkynyl, cycloalkyl, phenylalkyl, phenylalkenyl, naphthylalkyl, naphthylkenyl, phenyl and naphthyl which is substituted with a substituent selected from the group consisting of chloro, bromo, fluoro, iodo, amino, alkylamino having 1-4 carbon atoms in the alkyl moiety, dialkylamino having 1-4 carbon atoms in each alkyl moiety, nitro, alkyl having 1-4 carbon atoms, alkoxy having 1-4 carbon atoms, phenyloxy, naphthyloxy, and mixtures of such substituents; d'. when Y is S, and R and R₃ are the same as defined under (a') above, R₁ and R₂ taken together represent a member selected from the group consisting of alkylidene having 1-4 carbon atoms, cycloalkylidene having 5-6 ring carbon atoms, phenylalkylidene having 2-4 carbon atoms in the alkylidene moiety and naphthylalkylidene having 2-4 carbon atoms in the alkylidene moiety substituted with a substituent selected from the group consisting of furyl, nitrofuryl and pyridyl.
 2. Substituted 1,2,4-triazine-5-one according to claim 1 whereina". when Y is O, R is selected from the group consisting of alkyl having 1-6 carbon atoms, cyclohexyl, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, phenylalkenyl having 2-4 carbon atoms in the alkenyl moiety, phenyl, furyl, carboalkoxyalkyl having 1-4 carbon atoms in the carboalkoxy moiety and 1-4 carbon atoms in the alkyl moiety, phenyl alkylmercapto alkyl having 1-4 carbon atoms in each corresponding alkyl moiety, chloro substituted phenylalkyl having 1-4 carbon atoms in the alkyl moiety, alkylphenyl having 1-4 carbon atoms in the alkyl moiety, alkoxyphenyl having 1-4 carbon atoms in the alkoxy moiety, and nitro substituted phenyl, R₁ and R₂ taken together represent a member selected from the group consisting of furyl alkylidene having 1-4 carbon atoms in the alkylidene moiety, nitrofuryl alkylidene having 1-4 carbon atoms in the alkylidene moiety, and pyridyl alkylidene having 1-4 carbon atoms in the alkylidene moiety, and R₃ is selected from the group consisting of alkanoyl having 1-4 carbon atoms, hydrogen, alkyl having 1-4 carbon atoms, alkenyl having 2-4 carbon atoms, alkynyl having 2-4 carbon atoms, cyclohexyl, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, chloro substituted alkenyl having 2-4 carbon atoms, dialkylamino having 1-4 carbon atoms in each alkyl moiety, chloro substituted phenylalkyl having 1-4 carbon atoms in the alkyl moiety, and chloro substituted phenyl; b". when Y is S, and R₁, R₂ and R₃ are the same as defined under (a") above, R is selected from the group consisting of alkyl having 2-6 carbon atoms, cyclohexyl, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, phenylalkenyl having 2-4 carbon atoms in the alkenyl moiety, furyl, carboalkoxyalkyl having 1-4 carbon atoms in the carboalkoxy moiety and 1-4 carbon atoms in the alkyl moiety, phenylalkylmercapto alkyl having 1-4 carbon atoms in each corresponding alkyl moiety, chloro substituted phenylalkyl having 1-4 carbon atoms in the alkyl moiety, alkylphenyl having 1-4 carbon atoms in the alkyl moiety, alkoxyphenyl having 1-4 carbon atoms in the alkoxy moiety, and nitro substituted phenyl; c". when Y is S, and R, R₁ and R₂ are the same as defined under (a") above, R₃ is selected from the group consisting of alkyl having 2-6 carbon atoms, alkenyl having 2-4 carbon atoms, alkynyl having 2-4 carbon atoms, cyclohexyl, phenylalkyl having 1-4 carbon atoms in the alkyl moiety, chloroalkenyl having 2-4 carbon atoms, dialkylamino having 1-4 carbon atoms in each alkyl moiety, chloro substituted phenylalkyl having 1-4 carbon atoms in the alkyl moiety, and chloro substituted phenyl; and d". when Y is S, and R and R₃ are the same as defined under (a") above, R₁ and R₂ taken together represent a member selected from the group consisting of furylalkylidene having 1-4 carbon atoms in the alkylidene moiety, nitrofurylalkylidene having 1-4 carbon atoms in the alkylidene moiety, and pyridylalkylidene having 1-4 carbon atoms in the alkylidene moiety.
 3. Substituted 1,2,4-triazine-5-one according to claim 1 wherein R₁ and R₂ taken together are furfurylidene.
 4. Substituted 1,2,4-triazine-5-one according to claim 1, wherein R₁ and R₂ taken together are nitrofurfurylidene.
 5. Substituted 1,2,4-triazine-5-one according to claim 1 wherein R₁ and R₂ taken together are pyridyl-methylidene.
 6. Substituted 1,2,4-triazine-5-one according to claim 1 wherein R₁ and R₂ taken together are pyrano-cyclopentylidene.
 7. Substituted 1,2,4-triazine-5-one according to claim 1 wherein R is isopropyl.
 8. Substituted 1,2,4-triazine-5-one according to claim 3 wherein such compound is3-methylthio-4-(furfurylidene-2'-)amino-6-phenyl-1,2,4-triazine-5-one.
 9. Substituted 1,2,4-triazine-5-one according to claim 4 wherein such compound is3-methylthio-4(5'-nitrofurfurylidene-2'-)-amino-6-phenyl-1,2,4-triazine-5-one.
 10. Substituted 1,2,4-triazine-5-one according to claim 5 wherein such compound is3-methylthio-4-[pyridyl-(2)-methylidene-amino]-6-phenyl-1,2,4-triazine-5-one.
 11. Substituted 1,2,4-triazine-5-one according to claim 6 wherein such compound is3-(3-ethoxy-5-isopropyl-naphthyl-n-propylmercapto)-4-(4-(4-pyrano cyclopentylideneamino)-6-(10-bromodec-1-yl)-1,2,4-triazine-5-one. 